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TABLE OF CONTENTS
Paragraph Chapter/Section Page Number Title Number Number
CHAPTER 96 ELECTRICAL
ELECTRICAL SYSTEMS
96-1 General Description
.......................................................................
96-00-00 2996-2 Electrical Safety and
Hazards................................................... 96-00-00
3096-3 Safety Practices
General.............................................. 96-00-00
3096-4 Standard Practices Electrical Maintenance or
Repairs..............................................................................
96-00-00 3096-5 Standard Practices Electrical Work In Confined
Spaces
..............................................................................
96-00-00 3196-6 Standard Practices After Electrical Maintenance
or Repairs
.........................................................................
96-00-00 3196-7 Miscellaneous Electrical
Tools.......................................................
96-00-00 3196-8 Electrical
Systems..........................................................................
96-00-00 3396-9 Operational Checks, Functional Checks, and
Troubleshooting
Charts
............................................................................................
96-00-00 3696-10 General Troubleshooting
...............................................................
96-00-00 3696-11 Miscellaneous Electrical Components Maintenance
Practices . 96-00-00 3696-12 Miscellaneous Electrical Components
Removal .................. 96-00-00 3696-13 Miscellaneous
Electrical Components Cleaning .................. 96-00-00 3796-14
Miscellaneous Electrical Components Inspection ................
96-00-00 3796-15 Miscellaneous Electrical Components Installation
............... 96-00-00 3796-16 Semiconductor Devices
Description.......................................... 96-00-00
4096-17 Standard and Zener Diodes Description
.............................. 96-00-00 4096-18 Standard and Zener
Diodes Functional Check .................... 96-00-00 4096-19
Transient Suppression Diode Assemblies Description ........
96-00-00 4496-20 Transient Suppression Diode Assemblies
Functional
Check........................................................................................
96-00-00 4496-21 Transistor Negative Positive Negative (NPN)
Description ... 96-00-00 4496-22 Transistor (NPN) Functional Check
..................................... 96-00-00 4496-23
Semiconductor Devices Maintenance Practices .......... 96-00-00
4496-24 Control Panels Electrical
...................................................... 96-00-00
4496-25 Control Panels
Removal............................................... 96-00-00
4496-26 Control Panels Inspection
............................................ 96-00-00 4796-27
Control Panels Repair
.................................................. 96-00-00 4796-28
Control Panels
Installation............................................ 96-00-00
4796-29 Circuit Breakers
........................................................................
96-00-00 4796-30 Circuit Breaker Removal
.............................................. 96-00-00 4796-31
Circuit Breaker Inspection
............................................ 96-00-00 4896-32
Circuit Breaker Installation
........................................... 96-00-00 4896-33
Electrical Load Analysis
.................................................................
96-00-00 4896-34 DC Generator Output Load
Capacity........................................ 96-00-00 4896-35
Electrical and Electronic Components Reference Designator...
96-00-00 5796-36 Electrical Components and Assemblies Reference
Designator
Assignment.............................................................
96-00-00 57
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-37 Electrical and Electronic Components,
ReferenceDesignator/Description/Location Reference Table
andLocation Figure
.........................................................................
96-00-00 58
96-38 Circuit, Wires, and Cable Harness Designations
...................... 96-00-00 16396-39 Wire Identification Code
Description .................................... 96-00-00 16396-40
Wire Harness and Cable
Designation....................................... 96-00-00 163
DC POWER SYSTEM
96-41 DC Power
System..........................................................................
96-00-00 16796-42 Battery
System...............................................................................
96-00-00 16796-43 Battery
......................................................................................
96-00-00 16796-44 Battery General
Warnings....................................................
96-00-00 16996-45 Battery Vent
..............................................................................
96-00-00 16996-46 Battery Relay (2K1)
..................................................................
96-00-00 16996-47 Battery Switch (2S1)
.................................................................
96-00-00 17096-48 Battery System Operation
.................................................... 96-00-00
17096-49 Battery System Operational Check
.............................. 96-00-00 17096-50 17 Amp/Hour
Battery Removal..................................... 96-00-00
17496-51 28 Amp/Hour Battery
Removal..................................... 96-00-00 17796-52
Battery Maintenance Practices.....................................
96-00-00 17796-53 Battery Charging Procedure (17 Amp/Hour and
28 Amp/Hour Batteries)
.................................................... 96-00-00
17996-54 Battery External Inspection
.......................................... 96-00-00 17996-55
Battery Case and Battery Compartment Cleaning ....... 96-00-00
17996-56 17 Amp/Hour Battery
Installation.................................. 96-00-00 18096-57 28
Amp/Hour Battery Installation..................................
96-00-00 18196-58 Battery Relay (2K1)
Removal....................................... 96-00-00 18296-59
Battery Relay (2K1)
Installation.................................... 96-00-00 18296-60
External DC Power System
Description.................................... 96-00-00 18496-61
External Power Receptacle
...................................................... 96-00-00
18496-62 External Power Relay (2K2)
..................................................... 96-00-00
18496-63 External DC Power
Operation.............................................. 96-00-00
18496-64 External DC Power Operational Check
........................ 96-00-00 18696-65 External Power Relay
(2K2) Removal.......................... 96-00-00 18696-66 External
Power Relay (2K2) Installation....................... 96-00-00
18896-67 External Power Receptacle Replacement....................
96-00-00 18896-68 Start and Ignition
System...............................................................
96-00-00 18896-69 Start Switch (4A1S3)
Description......................................... 96-00-00
19096-70 FADEC/Start Relay (1K3) Description
................................. 96-00-00 19096-71 FADEC Mode
Switch (1S18) Description............................. 96-00-00
19496-72 FADEC/ECU (1A50)
.................................................................
96-00-00 19496-73 STARTER RELAY (1K1)
Description................................... 96-00-00 19596-74
Ignitor Relay (2K4) Description
............................................ 96-00-00 19596-75
Voltage Regulator
(2VR1).........................................................
96-00-00 19696-76 Starter Generator
(2MG1).........................................................
96-00-00 19696-77 Ignitor Exciter Box, Ignitor Lead, and Spark
Ignitor
Description
...........................................................................
96-00-00 196
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-78 Start and Ignitor System
Operation...................................... 96-00-00 19796-79
Auto Mode Simplified Operational Description.....................
96-00-00 19796-80 Manual Mode Simplified Operational Description
................ 96-00-00 19896-81 Automatic Mode Full Operational
Description...................... 96-00-00 19896-82 Manual Mode
Full Operational Description .......................... 96-00-00
20096-83 Start and Ignition System Operational Check
...................... 96-00-00 20196-84 Start Latching Circuit
Functional Check ............................... 96-00-00 20696-85
Ignitor Circuit Functional Check (S/N 53000 Through
54299).......................................................................................
96-00-00 21096-86 Starter Generator (2MG1) Maintenance
Practices............... 96-00-00 21296-87 Voltage Regulator (2VR1)
Removal and Installation............ 96-00-00 21296-88 FADEC/ECU
(1A50) Removal and Installation .................... 96-00-00
21296-89 Ignitor Exciter Box and Spark Ignitor Removal and
Installation.................................................................................
96-00-00 21296-90 Base Mounted Relays, Engine Out Relay (1K2),
FADEC/Start
Relay (1K3), and Ignitor Relay (2K4) Removal
.................... 96-00-00 21296-91 Base Mounted Relays, Engine
Out Relay (1K2), FADEC/Start
Relay (1K3), and Ignitor Relay (2K4) Installation
................. 96-00-00 21396-92 Starter Relay (1K1) Removal
............................................... 96-00-00 21796-93
Starter Relay (1K1) Installation
............................................ 96-00-00 21996-94
FADEC Mode Switch (1S18) Removal (S/N 53000
Through 54299)
........................................................................
96-00-00 21996-95 FADEC Mode Switch (1S18) Installation (S/N
53000
Through 54299)
........................................................................
96-00-00 22196-96 FADEC Mode Switch (1S18) Operational Check
(S/N 53000 and Subsequent)
................................................... 96-00-00
22296-97 FADEC Mode Switch (1S18) Functional Check (S/N 53000
and Subsequent)
......................................................................
96-00-00 22296-98 FADEC Mode Switch Lamps Removal (S/N 53000
Through 54299)
........................................................................
96-00-00 22496-99 FADEC Mode Switch Lamps Installation (S/N
53000
Through 54299)
........................................................................
96-00-00 22596-100 Generator
System..........................................................................
96-00-00 22596-101 Generator Reset Switch
(2S2).................................................. 96-00-00
22796-102 Voltage Regulator
(2VR1).........................................................
96-00-00 22796-103 Start and Regulation
......................................................... 96-00-00
22796-104
Overvoltage.......................................................................
96-00-00 22996-105
Undervoltage.....................................................................
96-00-00 22996-106 Generator Reverse Current
.............................................. 96-00-00 22996-107
Starter Generator
(2MG1).........................................................
96-00-00 22996-108 Generator Relay
(2K3)..............................................................
96-00-00 23096-109 Shunt (2R1) and Ammeter Indication
....................................... 96-00-00 23096-110
Generator System Operation
............................................... 96-00-00 23296-111
Generator System Operational Check .........................
96-00-00 23296-112 Voltage Regulator (2VR1) Adjustment
......................... 96-00-00 23596-113 Voltage Regulator
(2VR1) Inspection........................... 96-00-00 24296-114
Starter Generator (2MG1) Inspection...........................
96-00-00 242
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-115 Starter Generator (2MG1)
Repair................................. 96-00-00 24396-116
Generator Reset Switch (2S2) Removal and
Installation.........................................................................
96-00-00 24396-117 Voltage Regulator (2VR1) Removal
............................. 96-00-00 24396-118 Voltage Regulator
(2VR1) Installation .......................... 96-00-00 24396-119
Generator Relay (2K3) Removal ..................................
96-00-00 24896-120 Generator Relay (2K3) Installation
............................... 96-00-00 24896-121 Starter
Generator (2MG1) Removal ............................. 96-00-00
25096-122 Starter Generator (2MG1) Installation
.......................... 96-00-00 25096-123 Shunt Resistor (2R1)
Removal and Installation ........... 96-00-00 250
CAUTION/WARNING/ADVISORY (407) AND CREW ALERTING SYSTEM
(407GX)
96-124 Caution/Warning/Advisory (407) and Crew Alerting
System(407GX)
.........................................................................................
96-00-00 251
96-125 Caution/Warning/Advisory Panel (4DS1) (S/N 53000
Through54299).......................................................................................
96-00-00 251
96-126 Crew Alerting System (CAS) (S/N 54300 and
Subsequent)..... 96-00-00 25196-127 Audio Alert Activation and
Description (S/N 54300 and
Subsequent)
.............................................................................
96-00-00 25996-128 Audio Alert Test (S/N 54300 and
Subsequent)......................... 96-00-00 25996-129 Master
Warning/Caution System PBA Operation
(S/N 54300 and Subsequent)
........................................... 96-00-00 25996-130
Master Warning/Caution System PBA Removal and
Installation (S/N 54300 and Subsequent)
......................... 96-00-00 25996-131 Master Warning/Caution
PBA System Operational
Check (S/N 54300 and Subsequent)
................................ 96-00-00 26296-132
Caution/Warning/Advisory Panel (4DS1) (S/N 53000 Through
54299) Functional Check
..................................................... 96-00-00
26696-133 Caution/Warning/Advisory Panel (4DS1) Lamps
Replacement (S/N 53000 Through 54299) ..........................
96-00-00 26796-134 Caution/Warning/Advisory Panel (4DS1),
Individual
Annunciator Lens Replacement (S/N 53000 Through 54299) 96-00-00
26996-135 Caution/Warning/Advisory Panel (4DS1) Removal
(S/N 53000 Through 54299)
............................................. 96-00-00 27196-136
Caution/Warning/Advisory Panel (4DS1) Installation
(S/N 53000 Through 54299)
............................................. 96-00-00 27196-137
FLOAT TEST Annunciator Circuit Operation .......................
96-00-00 27196-138 FLOAT TEST Annunciator Circuit Operational Check
. 96-00-00 27596-139 FLOAT TEST Annunciator Circuit Component
Replacement.....................................................................
96-00-00 27596-140 FLOAT ARM Annunciator Circuit Operation
........................ 96-00-00 27996-141 FLOAT ARM Annunciator
Circuit Operational Check... 96-00-00 27996-142 FLOAT ARM
Annunciator Circuit Component
Replacement.....................................................................
96-00-00 28396-143 ENGINE FIRE Annunciator Circuit Operation
...................... 96-00-00 28396-144 ENGINE FIRE Annunciator
Circuit Operational
Check................................................................................
96-00-00 283
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-145 ENGINE FIRE Annunciator Circuit Functional Check ..
96-00-00 28796-146 ENGINE FIRE Annunciator Circuit Component
Replacement.....................................................................
96-00-00 28796-147 ENGINE ANTI-ICE Annunciator Circuit
Operation............... 96-00-00 28796-148 ENGINE ANTI-ICE
Annunciator Circuit Operational
Check................................................................................
96-00-00 28796-149 Engine Anti-ice Pressure Switch (1S50) Removal
....... 96-00-00 29096-150 Engine Anti-ice Pressure Switch (1S50)
Functional
Check................................................................................
96-00-00 29096-151 Engine Anti-ice Pressure Switch (1S50)
Installation .... 96-00-00 29396-152 Auto Relight Mode (AUTO
RELIGHT) Annunciator Circuit
Operation
.............................................................................
96-00-00 29396-153 AUTO RELIGHT Annunciator Circuit Operational
Check................................................................................
96-00-00 29596-154 AUTO RELIGHT Annunciator Circuit Component
Replacement.....................................................................
96-00-00 29596-155 START Annunciator Circuit Operation
................................. 96-00-00 29896-156 START
Annunciator Circuit Operational Check ........... 96-00-00
29896-157 START Annunciator Circuit Component Replacement 96-00-00
30196-158 BAGGAGE DOOR Annunciator Circuit Operation
............... 96-00-00 30196-159 BAGGAGE DOOR Annunciator Circuit
Operational
Check................................................................................
96-00-00 30196-160 Baggage Door Switch (4S6)
Removal.......................... 96-00-00 30696-161 Baggage Door
Switch (4S6) Installation....................... 96-00-00 30696-162
Baggage Door Switch (4S6) Adjustment...................... 96-00-00
30696-163 Litter Door Open (LITTER DOOR) Annunciator Circuit
Operation
.............................................................................
96-00-00 30696-164 LITTER DOOR Annunciator Circuit Operational
Check................................................................................
96-00-00 30696-165 Litter Door Switch (24S6) Removal and
Installation..... 96-00-00 31096-166 HEATER OVERTEMP Annunciator
Circuit Operation ......... 96-00-00 31096-167 HEATER OVERTEMP
Annunciator Circuit
Operational Check and Troubleshooting......................
96-00-00 31096-168 HEATER OVERTEMP Annunciator Circuit
Component
Replacement............................................. 96-00-00
31096-169 L/FUEL BOOST Annunciator Circuit Operation
................... 96-00-00 31396-170 L/FUEL BOOST Annunciator
Circuit Operational
Check................................................................................
96-00-00 31396-171 Left Boost Pump Fuel Pressure Switch (1S22)
Functional
Check..........................................................
96-00-00 31796-172 Left Boost Pump Fuel Pressure Switch (1S22)
Removal
.......................................................................
96-00-00 31796-173 Left Boost Pump Fuel Pressure Switch (1S22)
Installation
....................................................................
96-00-00 32096-174 L/FUEL BOOST Annunciator Circuit Component
Replacement.....................................................................
96-00-00 321
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-175 Left and Right Fuel Transfer Pump (L/FUEL XFR,R/FUEL XFR)
Annunciators Circuit Operation (S/N 53000Through 53174)
........................................................................
96-00-00 321
96-176 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Circuit Operation (S/N 53175 Through 54299)
96-00-00 324
96-177 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Circuit Operation (S/N 54300 and Subsequent)
96-00-00 327
96-178 Left and Right Fuel Transfer Pump (L/FUEL XFR,R/FUEL XFR)
Annunciators Operational Check(S/N 53000 Through 53174 Pre TB
407-08-85)................ 96-00-00 330
96-179 Left and Right Fuel Transfer Pump (L/FUEL XFR,R/FUEL XFR)
Annunciators Operational Check(S/N 53000 Through 53799 Post TB
407-08-85 andS/N 53800 Through 54299)
.............................................. 96-00-00 333
96-180 Left and Right Fuel Transfer Pump (L/FUEL XFR,R/FUEL XFR)
Annunciators Operational Check(S/N 54300 and Subsequent)
........................................... 96-00-00 342
96-181 Left and Right Transfer Pump Fuel Pressure Switches(1S24
and 1S23) Functional Check ............................. 96-00-00
348
96-182 Left Transfer Pump Fuel Pressure Switch (1S24) Removal
.......................................................................
96-00-00 348
96-183 Left Transfer Pump Fuel Pressure Switch (1S24)
Installation
....................................................................
96-00-00 351
96-184 Right Transfer Pump Fuel Pressure Switch (1S23) Removal
.......................................................................
96-00-00 352
96-185 Right Transfer Pump Fuel Pressure Switch (1S23)
Installation
....................................................................
96-00-00 353
96-186 Left and Right Transfer Pump Annunciators
ComponentReplacement.....................................................................
96-00-00 355
96-187 FUEL FILTER Annunciator Circuit Operation
...................... 96-00-00 35596-188 FUEL FILTER Annunciator
Circuit Operational Check. 96-00-00 35796-189 FUEL FILTER
Annunciator Component Replacement
(S/N 53000 Through 54299)
............................................. 96-00-00 35796-190
R/FUEL BOOST Annunciator Circuit Operation...................
96-00-00 35796-191 R/FUEL BOOST Annunciator Circuit Operational
Check................................................................................
96-00-00 36196-192 Right Boost Pump Fuel Pressure Switch (1S21)
Functional
Check..........................................................
96-00-00 36196-193 Right Boost Pump Fuel Pressure Switch (1S21)
Removal
.......................................................................
96-00-00 36496-194 Right Boost Pump Fuel Pressure Switch (1S21)
Installation
....................................................................
96-00-00 36596-195 Right Boost Pump Annunciator Circuit
Component
Replacement.....................................................................
96-00-00 36796-196 FUEL VALVE Annunciator Circuit Operation
....................... 96-00-00 36896-197 FUEL VALVE Annunciator
Circuit Operational Check . 96-00-00 368
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-198 Fuel Shutoff Valve Relay (1K6) Removal (S/N 53000Through
54299)
................................................................
96-00-00 375
96-199 Fuel Shutoff Valve Relay (1K6) Installation (S/N
53000Through 54299)
................................................................
96-00-00 375
96-200 FUEL VALVE Annunciator Circuit
ComponentReplacement.....................................................................
96-00-00 377
96-201 FADEC FAULT Annunciator Circuit Operation
.................... 96-00-00 37796-202 FADEC FAULT Annunciator
Circuit Operational
Check................................................................................
96-00-00 37796-203 FADEC FAULT Annunciator Circuit Functional
Check................................................................................
96-00-00 37996-204 FADEC FAULT Annunciator Circuit Component
Replacement.....................................................................
96-00-00 38196-205 RESTART FAULT Annunciator Circuit
Operation................ 96-00-00 38196-206 RESTART FAULT
Annunciator Circuit Operational
Check................................................................................
96-00-00 38196-207 RESTART FAULT Annunciator Circuit Functional
Check................................................................................
96-00-00 38496-208 RESTART FAULT Annunciator Circuit Component
Replacement.....................................................................
96-00-00 38796-209 FUEL LOW Annunciator Circuit
Operation........................... 96-00-00 38796-210 FUEL LOW
Annunciator Circuit Operational Check..... 96-00-00 38796-211 FUEL
LOW Annunciator Circuit Component
Replacement.....................................................................
96-00-00 39396-212 FADEC FAIL Annunciator and Fail Horn/Audio Alert
Circuit
Operation
.............................................................................
96-00-00 39396-213 FADEC FAIL Annunciator and Fail Horn Circuit
Operational
Check........................................................
96-00-00 39996-214 FADEC FAIL Annunciator and Fail Horn Circuit
Functional
Check..........................................................
96-00-00 39996-215 FADEC FAIL Annunciator Circuit, ECU Fail
Relay
(1K5) Removal
.............................................................
96-00-00 40096-216 FADEC FAIL Annunciator Circuit, ECU Fail
Relay
(1K5) Installation
.......................................................... 96-00-00
40696-217 FADEC FAIL Annunciator Circuit Component
Replacement.....................................................................
96-00-00 40696-218 FADEC DEGRADED Annunciator Circuit Operation
........... 96-00-00 40796-219 FADEC DEGRADED Annunciator Circuit
Operational
Check................................................................................
96-00-00 40796-220 FADEC DEGRADED Annunciator Circuit
Functional
Check................................................................................
96-00-00 40796-221 FADEC DEGRADED Annunciator Circuit Component
Replacement.....................................................................
96-00-00 40996-222 FADEC MANUAL Annunciator Circuit
Operation................. 96-00-00 41296-223 FADEC MANUAL
Annunciator Circuit Operational
Check................................................................................
96-00-00 41296-224 FADEC Auto/Manual Relay (1K4) Removal
................. 96-00-00 41796-225 FADEC Auto/Manual Relay (1K4)
Installation.............. 96-00-00 421
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-226 FADEC MANUAL Annunciator and Fail Horn Circuit Component
Replacement............................................. 96-00-00
421
96-227 ENGINE CHIP Annunciator Circuit
Operation...................... 96-00-00 42196-228 ENGINE CHIP
Annunciator Circuit Operational
Check................................................................................
96-00-00 42196-229 ENGINE CHIP Annunciator Circuit Functional
Check.. 96-00-00 42496-230 Engine Chip Detectors 1E7 and 1E8
Removal and
Installation.........................................................................
96-00-00 42496-231 ENGINE CHIP Annunciator Circuit Component
Replacement.....................................................................
96-00-00 42796-232 Transmission Chip (XMSN CHIP) Annunciator
Circuit
Operation
.............................................................................
96-00-00 42796-233 Transmission Chip (XMSN CHIP) Annunciator
Circuit
Operational
Check........................................................
96-00-00 42796-234 XMSN CHIP Annunciator Circuit Functional Check
..... 96-00-00 42796-235 Transmission Chip Detectors 1E3, 1E5, and
Freewheel
Chip Detector Removal and Installation .......................
96-00-00 43196-236 Transmission Chip (XMSN CHIP) Annunciator
Circuit
Component
Replacement............................................. 96-00-00
43196-237 Tail Rotor Gearbox Chip (T/R CHIP) Annunciator
Circuit
Operation
.............................................................................
96-00-00 43196-238 Tail Rotor Gearbox Chip (T/R CHIP) Annunciator
Circuit
Operational
Check........................................................
96-00-00 43596-239 Tail Rotor Gearbox Chip (T/R CHIP) Annunciator
Circuit
Functional
Check..........................................................
96-00-00 43596-240 Tail Rotor Gearbox Chip Detector (1E4)
Removal
and
Installation..................................................................
96-00-00 43596-241 Tail Rotor Gearbox Chip (T/R CHIP)
Annunciator
Circuit Component Replacement .................................
96-00-00 43596-242 Generator Fail (GEN FAIL) Annunciator Circuit
Operation .. 96-00-00 43896-243 Generator Fail (GEN FAIL)
Annunciator Circuit
Operational
Check........................................................
96-00-00 43896-244 Generator Fail (GEN FAIL) Annunciator
Circuit
Component
Replacement............................................. 96-00-00
43896-245 Transmission Oil Pressure (XMSN OIL PRESS)
Annunciator
Circuit Operation
..................................................................
96-00-00 44296-246 Transmission Oil Pressure (XMSN OIL PRESS)
Annunciator Circuit Operational Check ........................
96-00-00 44296-247 Transmission Oil Pressure Switch (1S4)
Removal....... 96-00-00 44696-248 Transmission Oil Pressure Switch
(1S4) Functional
Check................................................................................
96-00-00 44696-249 Transmission Oil Pressure Switch (1S4)
Installation.... 96-00-00 44996-250 Transmission Oil Pressure (XMSN
OIL PRESS)
Annunciator Circuit Component Replacement ............. 96-00-00
45096-251 Check Instruments (CHECK INSTR) Annunciator Circuit
Operation (S/N 53000 Through
54299)................................ 96-00-00 45096-252 Check
Instruments (CHECK INSTR) Annunciator Circuit
Operational Check (S/N 53000 Through 54299).......... 96-00-00
452
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-253 Check Instruments (CHECK INSTR) Annunciator Circuit
Component Replacement (S/N53000 Through 54299) 96-00-00 455
96-254 BATTERY RELAY Annunciator Circuit
Operation................ 96-00-00 45596-255 BATTERY RELAY
Annunciator Circuit Functional
Check................................................................................
96-00-00 45596-256 BATTERY RELAY Annunciator Circuit Component
Replacement.....................................................................
96-00-00 45796-257 Transmission Oil Temperature (XMSN OIL TEMP)
Annunciator Circuit Operation
.............................................. 96-00-00 45796-258
Transmission Oil Temperature (XMSN OIL TEMP)
Annunciator Circuit Operational Check ........................
96-00-00 46296-259 Transmission Oil Temperature Switch (1S3)
Removal 96-00-00 46296-260 Transmission Oil Temperature Switch
(1S3)
Functional
Check..........................................................
96-00-00 46596-261 Transmission Oil Temperature Switch (1S3)
Installation
....................................................................
96-00-00 46696-262 Transmission Oil Temperature (XMSN OIL TEMP)
Annunciator Circuit Component Replacement ............. 96-00-00
46796-263 HYDRAULIC SYSTEM Annunciator Circuit Operation ........
96-00-00 46796-264 HYDRAULIC SYSTEM Annunciator Circuit
Operational
Check........................................................
96-00-00 46796-265 Hydraulic Pressure Switch (9S1) Removal
.................. 96-00-00 47196-266 Hydraulic Pressure Switch
(9S1) Functional Check..... 96-00-00 47196-267 Hydraulic Pressure
Switch (9S1) Installation ............... 96-00-00 47396-268
HYDRAULIC SYSTEM Annunciator Circuit
Component
Replacement............................................. 96-00-00
47496-269 BATTERY HOT Annunciator Circuit
Operation.................... 96-00-00 47496-270 BATTERY HOT
Annunciator Circuit Functional Check 96-00-00 47796-271 BATTERY HOT
Annunciator Circuit, Battery Thermal
Switches
Inspection......................................................
96-00-00 47796-272 BATTERY HOT Annunciator Circuit Component
Replacement.....................................................................
96-00-00 47796-273 Engine Overspeed (ENGINE OVSPD) Annunciator
Circuit
Operation
.............................................................................
96-00-00 48096-274 Engine Overspeed (ENGINE OVSPD) Annunciator
Circuit Operational Check
............................................ 96-00-00 48096-275
Engine Overspeed (ENGINE OVSPD) Annunciator
Circuit Functional Check
.............................................. 96-00-00 48096-276
Engine Overspeed (ENGINE OVSPD) Annunciator
Circuit Component Replacement .................................
96-00-00 48296-277 WEIGHT-ON-GEAR and CYCLIC CENTERING
Annunciator
Circuit Operation
..................................................................
96-00-00 48596-278 CYCLIC CENTERING Annunciator Circuit
Functional
Check................................................................................
96-00-00 48596-279 CYCLIC CENTERING Annunciator Circuit
Troubleshooting............................................................
96-00-00 48596-280 Weight On Gear Switch (8S5)
Removal....................... 96-00-00 48896-281 Weight On Gear
Switch (8S5) Installation.................... 96-00-00 488
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-282 Weight On Gear Switch (8S5)
Rigging......................... 96-00-00 49096-283 CYCLIC
CENTERING Annunciator Circuit Component
Replacement.....................................................................
96-00-00 49296-284 ENGINE OUT Annunciator and Warning Horn
Circuit
Operation
.............................................................................
96-00-00 49296-285 ENGINE OUT Annunciator and Warning Horn
Circuit
Operational Check (S/N 53000 Through 54299).......... 96-00-00
49696-286 ENGINE OUT Warning Message Operational Check
(S/N 54300 and Subsequent)
........................................... 96-00-00 50396-287
ENGINE OUT Annunciator and Warning Horn Circuit,
FADEC Auto/Manual Relay (1K4), Engine Out Relay(1K2), Engine Out
Horn Mute Relay (4K2) Removal(S/N 53000 Through 54299)
............................................. 96-00-00 509
96-288 Engine Out Warning Message and Audio Alert Circuit,FADEC
Auto/Manual Relay (1K4) and Engine Out Relay(1K2) Removal (S/N
54300 and Subsequent).............. 96-00-00 512
96-289 ENGINE OUT Annunciator and Warning Horn Circuit,FADEC
Auto/Manual Relay (1K4), Engine Out Relay(1K2), Engine Out Horn
Mute Relay (4K2) Installation(S/N 53000 Through 54299)
............................................. 96-00-00 512
96-290 Engine Out Warning Message and Audio Alert Circuit,FADEC
Auto/Manual Relay (1K4) and Engine Out Relay(1K2) Installation (S/N
54300 and Subsequent)........... 96-00-00 514
96-291 ENGINE OUT Annunciator and Warning Horn Circuit Component
Replacement............................................. 96-00-00
514
96-292 PEDAL STOP Annunciator Circuit Operation (S/N
53000Through 54299)
........................................................................
96-00-00 514
96-293 Pedal Stop Caution Message Circuit Operation (S/N
54300and Subsequent)
......................................................................
96-00-00 517
96-294 PEDAL STOP Annunciator Circuit Operational Check.
96-00-00 51796-295 PEDAL STOP Annunciator Circuit Functional
Check
(S/N 53000 Through 54299)
............................................. 96-00-00 51796-296
PEDAL STOP Annunciator Circuit Component
Replacement.....................................................................
96-00-00 51896-297 RPM Annunciator and Warning Horn Circuit
Operation
(S/N 53000 Through 54299)
..................................................... 96-00-00
51896-298 RPM Warning Light and Audio Alert Circuit Operation
(S/N 54300 and Subsequent)
................................................... 96-00-00
51896-299 RPM Annunciator and Warning Horn Circuit
Operational Check (S/N 53000 Through 54299).......... 96-00-00
52196-300 RPM Warning Light and Audio Alert Circuit Operational
Check (S/N 54300 and Subsequent)
................................ 96-00-00 52196-301 RPM Annunciator
and Warning Horn Circuit, Low RPM
Horn Mute Relay (4K1) Removal (S/N 53000Through 54299)
................................................................
96-00-00 527
96-302 RPM Annunciator and Warning Horn Circuit, Low RotorRPM
Horn Mute Relay (4K1) Installation (S/N 53000Through 54299)
................................................................
96-00-00 531
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-303 RPM Annunciator and Rotor RPM Warning Horn/AudioAlert
Circuit Component Replacement ......................... 96-00-00
531
96-304 Avionics Cooling Fan (INSTR FAN) Annunciator Operation
(S/N 54300 and Subsequent).............................. 96-00-00
533
96-305 Avionics Cooling Fan (INSTR FAN) Annunciator Circuit
Operational Check (S/N 54300 and Subsequent) ........ 96-00-00
533
96-306 Avionics Cooling Fan Control Relay (2150K1) Removal (S/N
54300 and Subsequent)........................ 96-00-00 537
96-307 Avionics Cooling Fan Control Relay (2150K1) Installation
(S/N 54300 and Subsequent)..................... 96-00-00 539
96-308 Avionics Cooling Fan Component Replacement(S/N 54300 and
Subsequent) ........................................... 96-00-00
539
LIGHTING SYSTEMS
96-309 Lighting
Systems............................................................................
96-00-00 54196-310 Interior Lighting System Description
.................................... 96-00-00 54196-311 Map/Utility
Light (8DS7) Description ....................................
96-00-00 54196-312 Map/Utility Light Circuit Operational
Check.................. 96-00-00 54196-313 Map/Utility Light (8DS7)
Removal ................................ 96-00-00 54396-314
Map/Utility Light (8DS7) Installation .............................
96-00-00 54396-315 5VDC and 28 VDC Lighting Circuit Instrument
Panel,
Caution/Warning/ Advisory Panel, and Control PanelLighting (S/N
53000 Through 54299) .......................................
96-00-00 546
96-316 5 VDC Instrument Lighting Circuit Operation(S/N 53000
Through 54299) .............................................
96-00-00 546
96-317 28 VDC Instrument/Control Panel Lighting Circuit
Operation (S/N 53000 Through 54299)........................
96-00-00 548
96-318 Instrument and Panel Lighting System Operation(S/N 54300
and Subsequent) ...........................................
96-00-00 550
96-319 Caution/Warning/Advisory Panel Lighting and Dimming
Operation (S/N 53000 Through 54299)........................
96-00-00 553
96-320 5 VDC and 28 VDC Instrument/Control Panel LightingCircuit
Operational Check (S/N 53000 Through 54299) 96-00-00 556
96-321 Instrument and Panel Lighting System OperationalCheck
(S/N 54300 and Subsequent) ................................
96-00-00 557
96-322 Caution/Warning/Advisory Panel Lighting and Dimming
Operational Check (S/N 53000 Through 54299).......... 96-00-00
563
96-323 Transistor (8Q2) Removal
............................................ 96-00-00 57096-324
Transistor (8Q2) Installation
......................................... 96-00-00 57096-325 Zener
Diode (8CR2) Removal (S/N 53000 Through
54299)...............................................................................
96-00-00 57496-326 Zener Diode (8CR2) Installation (S/N 53000
Through
54299)...............................................................................
96-00-00 57496-327 Light Dimming Relay (8K3) Removal
........................... 96-00-00 57696-328 Light Dimming Relay
(8K3) Installation ........................ 96-00-00 576
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-329 5 VDC and 28 VDC Lighting Circuits, Instrument
Panel,Control Panel, Caution/Warning/Advisory Panel Component
Replacement............................................. 96-00-00
579
96-330 Cabin/Passenger Lighting System Description
......................... 96-00-00 57996-331 Cabin/Passenger
Lighting System Operation ...................... 96-00-00 57996-332
Cabin/Passenger Lighting System Operational
Check................................................................................
96-00-00 57996-333 Cabin/Passenger Lighting System Component
Replacement.....................................................................
96-00-00 58296-334 Exterior Lighting Systems
..............................................................
96-00-00 58296-335 Position Lights System Operation
........................................ 96-00-00 58296-336
Position Lights System Operational Check ..................
96-00-00 58296-337 Position (Navigation) Lights Removal (S/N
53000
Through 54299)
................................................................
96-00-00 58796-338 Forward Position Lights Removal (S/N 54300
and
Subsequent)......................................................................
96-00-00 58796-339 Aft Position Lights Removal (S/N 54300 and
Subsequent)......................................................................
96-00-00 59096-340 Tail Light (8DS4) Removal (S/N 53000 Through
54299)...............................................................................
96-00-00 59396-341 Tail Light (8DS4) Removal (S/N 54300 and
Subsequent)......................................................................
96-00-00 59396-342 Position Lights
Cleaning............................................... 96-00-00
59396-343 Position Lights
Inspection............................................. 96-00-00
59396-344 Position (Navigation) Lights Installation (S/N 53000
Through 54299)
................................................................
96-00-00 59596-345 Forward Position Lights Installation (S/N 54300
and
Subsequent)......................................................................
96-00-00 59596-346 Aft Position Lights Installation (S/N 54300
and
Subsequent)......................................................................
96-00-00 59696-347 Tail Light (8DS4) Installation (S/N 54300
and
Subsequent)......................................................................
96-00-00 59796-348 Anti-collision (Strobe) Light System Operation
(S/N 53000
Through 54299)
........................................................................
96-00-00 59896-349 Anti-collision (Strobe) Light System
Operational
Check (S/N 53000 Through 54299)
.................................. 96-00-00 59896-350
Anti-collision (Strobe) Light System Troubleshooting
(S/N 53000 Through 54299)
............................................. 96-00-00 60196-351
Anti-collision Light (8DS3) Removal (S/N 53000
Through 54299)
................................................................
96-00-00 60196-352 Anti-collision Light (8DS3) Installation (S/N
53000
Through 54299)
................................................................
96-00-00 60196-353 Strobe Light Power Supply (8PS1) Removal (S/N
53000
Through 54299)
................................................................
96-00-00 60396-354 Strobe Light Power Supply (8PS1)
Installation
(S/N 53000 Through 54299)
............................................. 96-00-00 60396-355
Anti-collision Light System Operation (S/N 54300 and
Subsequent)
.............................................................................
96-00-00 605
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-356 Anti-collision Light System Operational Check(S/N 54300
and Subsequent) ...........................................
96-00-00 605
96-357 Anti-collision Light (8DS3) Removal (S/N 54300
andSubsequent)......................................................................
96-00-00 605
96-358 Anti-collision Light Cleaning
......................................... 96-00-00 60796-359
Anti-collision Light Inspection
....................................... 96-00-00 60796-360
Anti-collision Light Installation (S/N 54300 and
Subsequent)......................................................................
96-00-00 60796-361 Landing Light System
Operation.......................................... 96-00-00
60996-362 Landing Light System Operational Check (S/N 53000
Through 54299)
................................................................
96-00-00 61196-363 Landing Light System Operational Check (S/N
54300
and
Subsequent)...............................................................
96-00-00 61196-364 Landing Lights (8DS1/8DS2) Removal
........................ 96-00-00 61796-365 Landing Lights
(8DS1/8DS2) Installation ..................... 96-00-00 61796-366
Landing Light Relays (8K1 and 8K2) Removal
(S/N 53000 Through 54299)
............................................. 96-00-00 61796-367
Landing Light Relays (8K1 and 8K2) Installation
(S/N 53000 Through 54299)
............................................. 96-00-00 61996-368
Landing Light Switch (4A1S2) Removal.......................
96-00-00 62196-369 Landing Light Switch (4A1S2)
Installation.................... 96-00-00 621
ENGINE ELECTRICAL SYSTEMS
96-370 Engine Electrical System
...............................................................
96-00-00 62396-371 Engine Anti-icing Circuit Description
.................................... 96-00-00 62396-372 Engine
Anti-ice Circuit Operational Check ................... 96-00-00
62396-373 Engine Anti-icing Circuit Functional Check
.................. 96-00-00 62596-374 Engine Anti-icing Circuit
Troubleshooting .................... 96-00-00 62696-375 ENG
ANTI-ICE Switch (4A2S1) Removal .................... 96-00-00
62696-376 ENG ANTI-ICE Switch (4A2S1) Installation
................. 96-00-00 62696-377 Engine Anti-icing Circuit
Component Replacement ..... 96-00-00 626
FUEL DISTRIBUTION ELECTRICAL SYSTEMS
96-378 Fuel Distribution Electrical
Systems............................................... 96-00-00
62996-379 Fuel Shutoff Valve Electrical System Operation
.................. 96-00-00 62996-380 Fuel Shutoff Valve Electrical
System, Fuel Cell Drain
Valve Circuit Operational Check
.................................. 96-00-00 63296-381 Fuel Shutoff
Valve (1B5) Removal and Installation...... 96-00-00 63796-382 Fuel
Valve Switch (4A3S1) Removal ........................... 96-00-00
63796-383 Fuel Valve Switch (4A3S1) Installation
........................ 96-00-00 63796-384 Fuel Shutoff Valve
Electrical System, Fuel Cell Drain
Valve Circuit Component Replacement .......................
96-00-00 64096-385 Fuel Cell Drain Valve Circuit Operation
............................... 96-00-00 64096-386 Fuel Cell Drain
Valves Circuit Operational Check........ 96-00-00 64096-387
Forward/Main Fuel Drain Switches (1S1) and (1S2)
Removal
.......................................................................
96-00-00 640
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-388 Forward/Main Fuel Drain Switches (1S1) and (1S2)
Installation
....................................................................
96-00-00 644
96-389 Fuel Drain Solenoid Valves (1L1 and 1L2) Removaland
Installation..................................................................
96-00-00 644
96-390 Right Fuel Transfer Pump/Right Fuel Boost Pump Circuit
Operation
.............................................................................
96-00-00 644
96-391 Right Fuel Transfer Pump Circuit (S/N 53000
Through53174)...............................................................................
96-00-00 651
96-392 Right Fuel Transfer Pump Circuit (S/N 53175
Through54299)...............................................................................
96-00-00 651
96-393 Right Fuel Transfer Pump Circuit (S/N 54300
andSubsequent)......................................................................
96-00-00 652
96-394 Right Fuel Boost Pump
Circuit.......................................... 96-00-00
65396-395 Right Fuel Transfer Pump/Right Fuel Boost Pump
Circuit
Operational
Check........................................................
96-00-00 65396-396 Right Fuel Transfer Pump Relay (1K8) Removal
......... 96-00-00 65496-397 Right Fuel Transfer Pump Relay (1K8)
Installation ...... 96-00-00 65896-398 Right Fuel Transfer
Pump/Right Fuel Boost Pump
Circuit Component Replacement .................................
96-00-00 66096-399 Left Fuel Transfer Pump/Left Boost Pump Circuit
Operation 96-00-00 66096-400 Left Fuel Transfer Pump Circuit (S/N
53000 Through
53174)...............................................................................
96-00-00 66096-401 Left Fuel Transfer Pump Circuit (S/N 53175
Through
54299)...............................................................................
96-00-00 66796-402 Left Fuel Transfer Pump Circuit (S/N 54300
and
Subsequent)......................................................................
96-00-00 66896-403 Left Fuel Boost Pump Circuit
............................................ 96-00-00 66896-404
Left Fuel Transfer Pump/Left Fuel Boost Pump Circuit
Operational
Check........................................................
96-00-00 66996-405 Left Fuel Transfer Pump Relay (1K7) Removal
........... 96-00-00 67196-406 Left Fuel Transfer Pump Relay (1K7)
Installation ........ 96-00-00 67696-407 Left Fuel Transfer
Pump/Left Fuel Boost Pump Circuit
Component
Replacement............................................. 96-00-00
676
HYDRAULIC ELECTRICAL CONTROL SYSTEM
96-408 Hydraulic Electrical Control
System............................................... 96-00-00
67796-409 Hydraulic Electrical Control System Operational
Check................................................................................
96-00-00 67796-410 Off Hyd Sys Switch (4A2S2) Removal
......................... 96-00-00 68396-411 Off Hyd Sys Switch
(4A2S2) Installation ...................... 96-00-00 68396-412
Hydraulic Bypass Solenoid (9L1) Replacement ........... 96-00-00
683
FLIGHT CONTROL ELECTRICAL SYSTEM
96-413 Airspeed Actuated Tail Rotor Pedal Restrictor Control
System Operation (S/N 53000 Through
54299)................................ 96-00-00 685
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-414 Airspeed Actuated Tail Rotor Pedal Restrictor Control
System Operation (S/N 54300 and
Subsequent).............................. 96-00-00 685
96-415 Airspeed Actuated Tail Rotor Pedal Restrictor
ControlSystem Operational Check (S/N 53000
Through54299)...............................................................................
96-00-00 688
96-416 Airspeed Actuated Tail Rotor Pedal Restrictor
ControlSystem Operational Check (S/N 54300
andSubsequent)......................................................................
96-00-00 688
96-417 Airspeed Actuated Tail Rotor Pedal Restrictor
ControlSystem Functional Check (S/N 53000
Through54299)...............................................................................
96-00-00 696
96-418 Airspeed Actuated Tail Rotor Pedal Restrictor
ControlSystem Functional Check (S/N 54300
andSubsequent)......................................................................
96-00-00 702
96-419 Pedal Restrictor Control Unit (PRCU) (6540CM1) Removal
(S/N 53000 Through 54299) ......................... 96-00-00
703
96-420 Pedal Restrictor Control Unit (PRCU) (6540CM1) Inspection
(S/N 53000 Through 54299) ....................... 96-00-00 703
96-421 Pedal Restrictor Control Unit (PRCU) (6540CM1)
Installation (S/N 53000 Through 54299) ......................
96-00-00 705
96-422 Pedal Stop Switch (6540DS1) Removal (S/N 53000Through
54299)
................................................................
96-00-00 705
96-423 Pedal Stop Switch (6540DS1) Installation (S/N
53000Through 54299)
................................................................
96-00-00 705
96-424 Pedal Stop Switch (6540DS1) Lamp Replacement(S/N 53000
Through 54299) .............................................
96-00-00 707
96-425 Airspeed Actuated Tail Rotor Pedal Restrictor
ControlElectrical System Component Replacement ................
96-00-00 707
96-426 Pedal Restrictor Control System Relay (6540K1) Removal
(S/N 54300 and Subsequent)........................ 96-00-00 707
96-427 Pedal Restrictor Control System Relay (6540K1)
Installation (S/N 54300 and Subsequent).....................
96-00-00 709
96-428 Miscellaneous Electrical
System.................................................... 96-00-00
71196-429 Particle Separator Electrical System Operation
................... 96-00-00 71196-430 Particle Separator
Electrical System Operational
Check................................................................................
96-00-00 71196-431 Auxiliary 28 VDC Power
Connector.......................................... 96-00-00
71596-432 Windshield Defogging Blower
System...................................... 96-00-00 71596-433
Windshield Defogging Blower System Operational
Check................................................................................
96-00-00 71596-434 Windshield Defogging Blower System
Troubleshooting............................................................
96-00-00 71596-435 Windshield Defog Blowers (10B1 and 10B2)
Replacement
................................................................
96-00-00 71896-436 Air Conditioning Electrical System (AIR COMM
STC).............. 96-00-00 71896-437 Cabin Heater Electrical
System (AIR COMM STC) .................. 96-00-00 71896-438 Tail
Rotor Camera (9700A1) (S/N 54300 and Subsequent) ..... 96-00-00
718
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TABLE OF CONTENTS (CONT)
Paragraph Chapter/Section Page Number Title Number Number
96-439 Tail Rotor Camera (9700A1) Operation (S/N 54300
andSubsequent)
.............................................................................
96-00-00 718
96-440 Tail Rotor Camera (9700A1) Operational Check(S/N 54300
and Subsequent) ...........................................
96-00-00 718
96-441 Tail Rotor Camera (9700A1) Removal (S/N 54300and
Subsequent)...............................................................
96-00-00 721
96-442 Tail Rotor Camera (9700A1) Cleaning (S/N 54300and
Subsequent)...............................................................
96-00-00 721
96-443 Tail Rotor Camera (9700A1) Inspection (S/N 54300and
Subsequent)...............................................................
96-00-00 721
96-444 Tail Rotor Camera (9700A1) Installation (S/N 54300and
Subsequent)...............................................................
96-00-00 723
96-445 Tail Rotor Camera Transistor (9700Q1) Removal........
96-00-00 72396-446 Tail Rotor Camera Transistor (9700Q1)
Installation..... 96-00-00 72496-447 Tail Rotor Camera Relay
(9700K1) Removal............... 96-00-00 72496-448 Tail Rotor
Camera Relay (9700K1) Installation............ 96-00-00 726
FIGURES
Figure Page Number Title Number
96-1 Standard Tools
...................................................................................................
3496-2 Standard Diode
Symbols................................................................................
4196-3 Standard Diode Functional
Check..................................................................
4296-4 Zener Diode Functional
Check.......................................................................
4396-5 Transient Suppression Diode Assemblies Functional
Check......................... 4596-6 Transistor (NPN) Functional
Check................................................................
4696-7 Electrical Components and Assemblies Reference Designator
Description .. 5996-8 Electrical and Electronic Components Location
............................................. 11696-9 Electrical
Wires Identification Code
Description............................................. 16496-10
Circuit Identification Example
.........................................................................
16596-11 DC Power System Simplified
Schematic........................................................
16896-12 Battery System Simplified
Schematic.............................................................
17196-13 Battery System Trouble No. 1
........................................................................
17396-14 Battery System Trouble No. 2
........................................................................
17596-15 17 Amp/Hour Battery Removal and Installation
............................................. 17696-16 28 Amp/Hour
Battery Removal and Installation
............................................. 17896-17 Battery
Relay (2K1) Removal and
Installation................................................
18396-18 External DC Power System Simplified Schematic
......................................... 18596-19 External DC
Power Trouble No. 1
..................................................................
18796-20 External Power Relay (2K2) Removal and
Installation................................... 18996-21 Start
Switch (4A1S3) Contact Arm Positions
................................................. 19196-22 Start
and Ignition System Simplified
Schematic............................................. 19296-23
Start and Ignition System Trouble No. 1
........................................................ 20396-24
Start and Ignition System Trouble No. 2
........................................................ 20496-25
Start and Ignition System Trouble No. 3
........................................................ 205
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FIGURES (CONT)
Figure Page Number Title Number
96-26 Start and Ignition System Trouble No. 4
........................................................ 20796-27
Start and Ignition System Trouble No. 5
........................................................ 20896-28
Start and Ignition System Trouble No. 6
........................................................ 20996-29
Ignition System Trouble No. 1
........................................................................
21196-30 Engine Out Relay (1K2) and FADEC/Start Relay (1K3)
Removal
and
Installation....................................................................................................
21496-31 Ignitor Relay (2K4) Removal and Installation
................................................. 21696-32 Starter
Relay (1K1) Removal and Installation
................................................ 21896-33 FADEC
Mode Switch (1S18)
..............................................................................
22096-34 FADEC Mode Switch Lamps (S/N 53000 Through 54299)
Removal
and
Installation....................................................................................................
22696-35 Voltage Regulator (2VR1) Simplified
Schematic............................................ 22896-36
Starter Generator (2MG1) Simplified
Schematic............................................ 23196-37
Generator System Simplified
Schematic........................................................
23396-38 Generator System Trouble No. 1
...................................................................
23696-39 Generator System Trouble No. 2
...................................................................
23796-40 Generator System Trouble No. 3
...................................................................
23896-41 Generator System Trouble No. 4
...................................................................
23996-42 Generator System Trouble No. 5
...................................................................
24096-43 Voltage Regulator (2VR1) Adjustment
...........................................................
24196-44 Wear Limits of the Starter Generator Brushes
Inspection.............................. 24496-45 Seating of the
Starter Generator Brushes
Inspection..................................... 24596-46 Correct
Position of the Starter Generator Brushes and Springs Inspection
... 24696-47 Voltage Regulator (2VR1) Removal and
Installation...................................... 24796-48
Generator Relay (2K3) Removal and
Installation........................................... 24996-49
Caution/Warning/Advisory Panel Quick Reference Table (S/N 53000
Through 54299)
..................................................................................................
25296-50 Caution/Warning/Advisory Panel Annunciators Internal
Simplified
Schematic (S/N 53000 Through 54299)
.............................................................
25496-51 Crew Alerting System (CAS) Messages PFD and MFD
Displays
(S/N 54300 and Subsequent)
.............................................................................
25696-52 Crew Alerting System (CAS) Messages Quick Reference
Table
(S/N 54300 and Subsequent)
.............................................................................
25796-53 Crew Alerting System (CAS) Message/Airframe Discrete Input
and Audio
Alert Reference Diagram (S/N 54300 and
Subsequent)..................................... 25896-54 Master
Warning/Caution PBS Simplified Schematic (S/N 54300 and
Subsequent)........................................................................................................
26196-55 Master Warning/Caution PBA System Trouble No. 1 (S/N 54300
and
Subsequent)........................................................................................................
26396-56 Master Warning/Caution PBA System Trouble No. 2 (S/N 54300
and
Subsequent)........................................................................................................
26496-57 Master Warning/Caution PBS System Trouble No. 3 (S/N 54300
and
Subsequent)........................................................................................................
26596-58 Caution/Warning/Advisory Panel Lamps Removal and
Installation
(S/N 53000 Through 54299)
...............................................................................
26896-59 Annunciator Lens Replacement (S/N 53000 Through 54299)
....................... 27096-60 Caution/Warning/Advisory Panel
(4DS1) Removal and Installation
(S/N 53000 Through 54299)
...............................................................................
27296-61 FLOAT ARM and FLOAT TEST Annunciators Circuit Simplified
Schematic . 273
-
BHT-407-MM-10
96-00-00Page 18 Rev. 33 23 SEP 2011 ECCN EAR99
FIGURES (CONT)
Figure Page Number Title Number
96-62 FLOAT TEST Annunciator Circuit Trouble No. 1
........................................... 27696-63 FLOAT TEST
Annunciator Circuit Trouble No. 2
........................................... 27796-64 FLOAT ARM
Annunciator Circuit Trouble No.
1............................................. 28096-65 FLOAT ARM
Annunciator Circuit Trouble No.
2............................................. 28296-66 ENGINE FIRE
Annunciator Circuit Simplified
Schematic............................... 28496-67 ENGINE FIRE
Annunciator Circuit Trouble No. 1
.......................................... 28696-68 ENGINE ANTI-ICE
Annunciator Circuit Simplified Schematic .......................
28896-69 ENGINE ANTI-ICE Annunciator Circuit Trouble No. 1
................................... 28996-70 ENGINE ANTI-ICE
Annunciator Circuit Trouble No. 2
................................... 29196-71 Engine Anti-ice
Pressure Switch (1S50) Removal and Installation ................
29296-72 AUTO RELIGHT Annunciator Circuit Simplified Schematic
........................... 29496-73 AUTO RELIGHT Annunciator
Circuit Trouble No. 1.......................................
29696-74 AUTO RELIGHT Annunciator Circuit Trouble No.
2....................................... 29796-75 START Annunciator
Circuit Simplified
Schematic.......................................... 29996-76 START
Annunciator Circuit Trouble No. 1
..................................................... 30096-77
START Annunciator Circuit Trouble No. 2
..................................................... 30296-78
BAGGAGE DOOR Annunciator Circuit Simplified
Schematic........................ 30396-79 BAGGAGE DOOR Annunciator
Circuit Trouble No. 1 ................................... 30496-80
BAGGAGE DOOR Annunciator Circuit Trouble No. 2
................................... 30596-81 Baggage Door Switch
(4S6) Maintenance Practices .....................................
30796-82 LITTER DOOR Annunciator Circuit Simplified Schematic
............................. 30896-83 LITTER DOOR Annunciator
Circuit Trouble No. 1 .........................................
30996-84 LITTER DOOR Annunciator Circuit Trouble No. 2
......................................... 31196-85 HEATER OVERTEMP
Annunciator Circuit Simplified Schematic.................. 31296-86
L/FUEL BOOST Annunciator Circuit Simplified
Schematic............................ 31496-87 L/FUEL BOOST
Annunciator Circuit Trouble No. 1
....................................... 31596-88 L/FUEL BOOST
Annunciator Circuit Trouble No. 2
....................................... 31696-89 Left Boost Pump
Fuel Pressure Switch (1S22) Removal and Installation...... 31996-90
Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR)
Annunciators Simplified Schematic (S/N 53000 Through 53174Pre TB
407-08-85)
..............................................................................................
322
96-91 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR)
Annunciators Simplified Schematic (S/N 53000 Through 53174 Post TB
407-08-85) ......... 323
96-92 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL XFR)
Annunciators Simplified Schematic (S/N 53175 Through 53799 Pre TB
407-08-85)........... 325
96-93 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Simplified Schematic (S/N 53175 Through 53799Post
TB 407-08-85 and S/N 53800 Through 54299)
.......................................... 326
96-94 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Simplified Schematic (S/N 54300 and Subsequent)
................ 328
96-95 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 1 (S/N 53000 Through 53174 Pre TB
407-08-85) 331
96-96 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 2 (S/N 53000 Through 53174 Pre TB
407-08-85) 332
96-97 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 3 (S/N 53000 Through 53174 Pre TB
407-08-85) 334
96-98 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 4 (S/N 53000 Through 53174 Pre TB
407-08-85) 335
-
BHT-407-MM-10
96-00-0023 SEP 2011 Rev. 33 Page 19ECCN EAR99
FIGURES (CONT)
Figure Page Number Title Number
96-99 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 5 (S/N 53000 Through 53174 Pre TB
407-08-85) 336
96-100 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 1 (S/N 53000 Through 53799 Post TB
407-08-85and S/N 53800 Through 54299)
.........................................................................
337
96-101 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR) Annunciators Trouble No. 2 (S/N 53000 Through 53799 Post TB
407-08-85 andS/N 53800 Through 54299)
................................................................................
338
96-102 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 3 (S/N 53000 Through 53799 Post TB
407-08-85and S/N 53800 Through 54299)
.........................................................................
339
96-103 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 4 (S/N 53000 Through 53799 Post TB
407-08-85and S/N 53800 Through 54299)
.........................................................................
340
96-104 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 5 (S/N 53000 Through 53799 Post TB
407-08-85and S/N 53800 Through 54299)
.........................................................................
341
96-105 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 1 (S/N 54300 and Subsequent)
............................ 343
96-106 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 2 (S/N 54300 and Subsequent)
............................ 344
96-107 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 3 (S/N 54300 and Subsequent)
............................ 345
96-108 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 4 (S/N 54300 and Subsequent)
............................ 346
96-109 Left and Right Fuel Transfer Pump (L/FUEL XFR, R/FUEL
XFR)Annunciators Trouble No. 5 (S/N 54300 and Subsequent)
............................ 347
96-110 Left Transfer Pump Fuel Pressure Switch (1S24) Removal
andInstallation...........................................................................................................
350
96-111 Right Transfer Pump Fuel Pressure Switch (1S23) Removal
andInstallation...........................................................................................................
354
96-112 FUEL FILTER Annunciator Circuit Simplified Schematic
............................... 35696-113 FUEL FILTER Annunciator
Circuit Trouble No. 1...........................................
35896-114 FUEL FILTER Annunciator Circuit Trouble No.
2........................................... 35996-115 R/FUEL BOOST
Annunciator Circuit Simplified Schematic
........................... 36096-116 R/FUEL BOOST Annunciator
Circuit Trouble No. 1.......................................
36296-117 R/FUEL BOOST Annunciator Circuit Trouble No.
2....................................... 36396-118 Right Boost Pump
Fuel Pressure Switch (1S21) Removal and Installation ... 36696-119
FUEL VALVE Annunciator Circuit Simplified
Schematic................................ 36996-120 FUEL VALVE
Annunciator Circuit Trouble No. 1
........................................... 37096-121 FUEL VALVE
Annunciator Circuit Trouble No. 2
........................................... 37296-122 FUEL VALVE
Annunciator Circuit Trouble No. 3 (S/N 53000 Through
54299).................................................................................................................
37496-123 Fuel Shutoff Valve Relay (1K6) Removal and Installation
(S/N 53000
Through 54299)
..................................................................................................
37696-124 FADEC FAULT Annunciator Circuit Simplified Schematic
............................. 37896-125 FADEC FAULT Annunciator
Circuit Trouble No. 1.........................................
38096-126 FADEC FAULT Annunciator Circuit Trouble No.
2......................................... 382
-
BHT-407-MM-10
96-00-00Page 20 Rev. 33 23 SEP 2011 ECCN EAR99
FIGURES (CONT)
Figure Page Number Title Number
96-127 RESTART FAULT Annunciator Circuit Simplified Schematic
........................ 38396-128 RESTART FAULT Annunciator
Circuit Trouble No. 1 ....................................
38596-129 RESTART FAULT Annunciator Circuit Trouble No. 2
.................................... 38696-130 FUEL LOW Annunciator
Circuit Simplified Schematic ...................................
38896-131 FUEL LOW Annunciator Circuit Trouble No.
1............................................... 39096-132 FUEL LOW
Annunciator Circuit Trouble No.
2............................................... 39196-133 FUEL LOW
Annunciator Circuit Trouble No.
3............................................... 39296-134 FUEL LOW
Annunciator Circuit Trouble No.
4............................................... 39496-135 FADEC
FAIL Annunciator and Fail Horn Circuit Simplified Schematic
(S/N 53000 Through 53015)
...............................................................................
39596-136 FADEC FAIL Annunciator and Fail Horn Circuit Simplified
Schematic
(S/N 53016 Through 54299)
...............................................................................
39696-137 FADEC FAIL Annunciator and Audio Mute Circuit Simplified
Schematic
(S/N 54300 and Subsequent)
.............................................................................
39896-138 FADEC FAIL Annunciator and Fail Horn Circuit Trouble No.
1...................... 40196-139 FADEC FAIL Annunciator and Fail
Horn Circuit Trouble No. 2...................... 40296-140 FADEC
FAIL Annunciator and Fail Horn Circuit Trouble No.
3...................... 40396-141 ECU Fail Relay (1K5) Removal and
Installation............................................. 40496-142
FADEC DEGRADED Annunciator Circuit Simplified Schematic
.................... 40896-143 FADEC DEGRADED Annunciator Circuit
Trouble No. 1................................ 41096-144 FADEC
DEGRADED Annunciator Circuit Trouble No.
2................................ 41196-145 FADEC MANUAL
Annunciator Circuit Simplified Schematic .........................
41396-146 FADEC MANUAL Annunciator Circuit Trouble No. 1
..................................... 41596-147 FADEC MANUAL
Annunciator Circuit Trouble No. 2
..................................... 41896-148 FADEC Auto/Manual
Relay (1K4) Removal and Installation..........................
41996-149 ENGINE CHIP Annunciator Circuit Simplified Schematic
.............................. 42296-150 ENGINE CHIP Annunciator
Circuit Trouble No. 1..........................................
42596-151 ENGINE CHIP Annunciator Circuit Trouble No.
2.......................................... 42696-152 Transmission
Chip (XMSN CHIP) Annunciator Circuit Simplified
Schematic
...........................................................................................................
42896-153 XMSN CHIP Annunciator Circuit Trouble No. 1
............................................. 43096-154 XMSN CHIP
Annunciator Circuit Trouble No. 2
............................................. 43296-155 T/R CHIP
Annunciator Circuit Simplified Schematic
...................................... 43396-156 Tail Rotor Gearbox
Chip (T/R CHIP) Annunciator Circuit Trouble No. 1........ 43696-157
Tail Rotor Gearbox Chip (T/R CHIP) Annunciator Circuit Trouble No.
2........ 43796-158 Generator Fail (GEN FAIL) Annunciator Circuit
Simplified Schematic........... 43996-159 Generator Fail (GEN FAIL)
Annunciator Circuit Trouble No. 1 ...................... 44096-160
Generator Fail (GEN FAIL) Annunciator Circuit Trouble No. 2
...................... 44196-161 Transmission Oil Pressure (XMSN
OIL PRESS) Annunciator Circuit
Simplified Schematic
......................................................................................
44396-162 Transmission Oil Pressure (XMSN OIL PRESS) Annunciator
Circuit
Trouble No.
1..................................................................................................
44496-163 Transmission Oil Pressure (XMSN OIL PRESS) Annunciator
Circuit
Trouble No.
2..................................................................................................
44596-164 Transmission Oil Pressure (XMSN OIL PRESS) Annunciator
Circuit
Trouble No.
3..................................................................................................
44796-165 Transmission Oil Pressure Switch (1S4) Removal and
Installation ............... 448
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BHT-407-MM-10
96-00-0023 SEP 2011 Rev. 33 Page 21ECCN EAR99
FIGURES (CONT)
Figure Page Number Title Number
96-166 Check Instruments (CHECK INSTR) Annunciator Circuit
SimplifiedSchematic (S/N 53000 Through 54299)
.............................................................
451
96-167 Check Instruments (CHECK INSTR) Annunciator Circuit
Trouble No. 1(S/N 53000 Through 54299)
...............................................................................
453
96-168 Check Instruments (CHECK INSTR) Annunciator Circuit
Trouble No. 2(S/N 53000 Through 54299)
...............................................................................
454
96-169 BATTERY RELAY Annunciator Circuit Simplified Schematic
........................ 45696-170 BATTERY RELAY Annunciator
Circuit Trouble No. 1.................................... 45896-171
BATTERY RELAY Annunciator Circuit Trouble No.
2.................................... 45996-172 BATTERY RELAY
Annunciator Circuit Trouble No.
3.................................... 46096-173 Transmission Oil
Temperature (XMSN OIL TEMP) Annunciator Circuit
Simplified Schematic
......................................................................................
46196-174 Transmission Oil Temperature (XMSN OIL TEMP) Annunciator
Circuit
Trouble No.
1..................................................................................................
46396-175 Transmission Oil Temperature Switch (1S3) Removal and
Installation ......... 46496-176 HYDRAULIC SYSTEM Annunciator
Circuit Simplified Schematic ................. 46896-177 HYDRAULIC
SYSTEM Annunciator Circuit Trouble No.
1............................. 46996-178 HYDRAULIC SYSTEM
Annunciator Circuit Trouble No. 2.............................
47096-179 Hydraulic Pressure Switch (9S1) Removal and Installation
........................... 47296-180 BATTERY HOT Annunciator
Circuit Simplified Schematic ............................ 47596-181
BATTERY HOT Annunciator Circuit Trouble No. 1
........................................ 47896-182 BATTERY HOT
Annunciator Circuit Trouble No. 2
........................................ 47996-183 Engine Overspeed
(ENGINE OVSPD) Annunciator Circuit Simplified
Schematic
...........................................................................................................
48196-184 Engine Overspeed (ENGINE OVSPD) Annunciator Circuit
Trouble No. 1..... 48396-185 Engine Overspeed (ENGINE OVSPD)
Annunciator Circuit Trouble No. 2..... 48496-186 CYCLIC CENTERING
Annunciator Circuit Simplified Schematic
(S/N 53000 Through 54299)
..............................................................................
48696-187 WEIGHT-ON-GEAR and CYCLIC CENTERING Annunciator
Circuit
Simplified Schematic (S/N 54300 and Subsequent)
...................................... 48796-188 Weight On Gear
Switch (8S5) Maintenance
Practices................................... 48996-189 ENGINE OUT
Annunciator and Warning Horn Circuit Simplified Schematic
(S/N 53000 Through 54299)
...............................................................................
49396-190 ENGINE OUT CAS Message Simplified Schematic (S/N 54300
and
Subsequent)........................................................................................................
49496-191 ENGINE OUT Annunciator and Warning Horn Circuit Trouble
No. 1
(S/N 53000 Through 54299)
...............................................................................
49796-192 ENGINE OUT Annunciator and Warning Horn Circuit Trouble
No. 2
(S/N 53000 Through 54299)
...............................................................................
49896-193 ENGINE OUT Annunciator and Warning Horn Circuit Trouble
No. 3
(S/N 53000 Through 54299)
...............................................................................
49996-194 ENGINE OUT Annunciator and Warning Horn Circuit Trouble
No. 4
(S/N 53000 Through 54299)
...............................................................................
50096-195 ENGINE OUT Annunciator and Warning Horn Circuit Trouble
No. 5
(S/N 53000 Through 54299)
...............................................................................
50196-196 ENGINE OUT Annunciator and Warning Horn Circuit Trouble
No. 6
(S/N 53000 Through 54299)
...............................................................................
502
-
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96-00-00Page 22 Rev. 33 23 SEP 2011 ECCN EAR99
FIGURES (CONT)
Figure Page Number Title Number
96-197 ENGINE OUT Annunciator and Warning Horn Circuit Trouble
No. 7(S/N 53000 Through 54299)
...............................................................................
504
96-198 Engine Out Warning Message and Audio Alert Circuit
Trouble No. 1(S/N 54300 and Subsequent)
.............................................................................
505
96-199 Engine Out Warning Message and Audio Alert Circuit
Trouble No. 2(S/N 54300 and Subsequent)
.............................................................................
506
96-200 Engine Out Warning Message and Audio Alert Circuit
Trouble No. 3(S/N 54300 and Subsequent)
.............................................................................
507
96-201 Engine Out Warning Message and Audio Alert Circuit
Trouble No. 4(S/N 54300 and Subsequent)
.............................................................................
508
96-202 Engine Out Warning Message and Audio Alert Circuit
Trouble No. 5(S/N 54300 and Subsequent)
.............................................................................
510
96-203 Engine Out Relay (1K2) and Engine Out Horn Mute Relay
(4K2) Removal and Installation (S/N 53000 Through 54299)
.................................. 511
96-204 Engine Out Relay (1K2) and FADEC Auto/Manual Relay (1K4)
Removaland Installation (S/N 54300 and Subsequent)
.................................................... 513
96-205 PEDAL STOP Annunciator Circuit Simplified Schematic (S/N
53000Through 54299)
..................................................................................................
515
96-206 PEDAL STOP Annunciator Circuit Simplified Schematic (S/N
54300and
Subsequent).................................................................................................
516
96-207 RPM Annunciator and Warning Horn Circuit Simplified
Schematic(S/N 53000 Through 54299)
...............................................................................
519
96-208 RPM Warning Light and Audio Alert Circuit Simplified
Schematic(S/N 54300 and Subsequent)
.............................................................................
520
96-209 RPM Annunciator and Warning Horn Circuit Trouble No. 1
(S/N 53000Through 54299)
..................................................................................................
522
96-210 RPM Annunciator and Warning Horn Circuit Trouble No. 2
(S/N 53000Through 54299)
..................................................................................................
523
96-211 RPM Annunciator and Warning Horn Circuit Trouble No. 3
(S/N 53000Through 54299)
..................................................................................................
524
96-212 Low Rotor Annunciator and Warning Horn Circuit Trouble
No. 4(S/N 53000 Through 54299)
...............................................................................
525
96-213 RPM Annunciator and Warning Horn Circuit Trouble No. 5
(S/N 53000Through 54299)
..................................................................................................
526
96-214 RPM Warning Light and Audio Alert Circuit Trouble No. 1
(S/N 54300and
Subsequent).................................................................................................
528
96-215 RPM Warning Light and Audio Alert Circuit Trouble No. 2
(S/N 54300and
Subsequent).................................................................................................
529
96-216 RPM Warning Light and Audio Alert Circuit Trouble No. 3
(S/N 54300and
Subsequent).................................................................................................
530
96-217 Low Rotor RPM Horn Mute Relay (4K1) Removal and
Installation(S/N 53000 Through 54299)
...............................................................................
532
96-218 Avionics Cooling Fan (INSTR FAN) Simplified
Schematic............................. 53496-219 Avionics Cooling
Fan (INSTR FAN) Trouble No. 1
........................................ 53596-220 Avionics Cooling
Fan (INSTR FAN) Trouble No. 2
........................................ 53696-221 Avionics Cooling
Fan Control Relay (2150K1) Removal and Installation
(S/N 54300 and Subsequent)
.............................................................................
53896-222 Map/Utility Light Circuit Simplified Schematic
................................................ 54296-223
Map/Utility Light Circuit Trouble No.
1............................................................
544
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BHT-407-MM-10
96-00-0023 SEP 2011 Rev. 33 Page 23ECCN EAR99
FIGURES (CONT)
Figure Page Number Title Number
96-224 Map/Utility Light Circuit Removal and Installation
.......................................... 54596-225 5 VDC
Instrument Lighting Circuit Simplified Schematic (S/N 53000
Through 54299)
..................................................................................................
54796-226 28 VDC Instrument/Control Panel Lighting Circuit
Simplified Schematic
(S/N 53000 Through 54299)
...............................................................................
54996-227 Instrument and Panel Lighting System Simplified Schematic
(S/N 54300
and
Subsequent).................................................................................................
55196-228 Caution/Warning/Advisory Panel Lighting and Dimming
Simplified
Schematic (S/N 53000 Through 54299)
.............................................................
55496-229 5 VDC and 28 VDC Instrument/Contro