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1. GeneralThe engine control system consist of:· the throttle control· the HP fuel shut-off valve control· the LP fuel shut-off valve controlA. Throttle Control Lever
(Ref. Fig. Throttle Control System SHEET 1)
CONTROLLEVER
REVERSERLATCHING
LEVER
AUTOTHRUSTINSTINCTIVEDISCONNECTPUSHBUTTON
RESOLVERTHROTTLE 1
TLA - A
TLA - B
RESOLVERTHROTTLE 2
TLA - A
TLA - B
EEC
ENGINE 2
EEC
ENGINE 1
N_MM_760000_0_XAM0_01_00
Figure 76(IAE)-00-00-11500-A / SHEET 1/1 - Throttle Control System
The throttle control system is fully electrical. The throttle control lever drives several position detectors. Theposition detectors are located under the cockpit center pedestal. Two of them are resolvers dedicated tothe FADEC system. Each channel of the Electronic Engine Control receives the position signal from oneresolver in the analog form.
B. ENG/MASTER Control Switch(Ref. Fig. Acquisition of the Discrete Signal by the FADEC SHEET 1)
EIU 1
EEC 1
EIU 2
EEC 2
ENG 1HP FUEL
SHUT OFF VALVESOLENOID
ENG 2HP FUEL
SHUT OFF VALVESOLENOID
N_MM_760000_0_XCM0_01_00
Figure 76(IAE)-00-00-11900-A / SHEET 1/1 - Acquisition of the Discrete Signal by the FADEC** ON A/C 016-022, 024-150, 201-250
The MASTER control switch interfaces with the HP fuel shut off valve and the Engine Interface Unit (EIU).It controls directly the closure of the fuel shut off valve when it energizes the valve solenoid.In parallel an analog signal informs the EIU of the position of the MASTER control switch.The EIU transmits then the information to the EEC in digital form.The EEC uses this information in addition to the ENG/MODE selector switch position and manual startpushbutton switch to control the starting sequence (Ref. AMM D/O 80-00-00-00) .
C. LP Fuel Shut-Off Valve Control (Ref.28-24-00)The LP fuel shut-off valve is electrically controlled:· either by the ENG/MASTER control switch on the ENG panel· or by the ENG FIRE pushbutton switch
2. Component Location(Ref. Fig. Control and Indicating - Component Location SHEET 1)
OVERHEAD PANEL 20VU
CENTER PEDESTAL 115VU
B
A
A
B
6KS
1WD
3KC
5KS1 5KS2
2KC
N_MM_760000_0_XEM0_01_00
Figure 76(IAE)-00-00-13400-A / SHEET 1/1 - Control and Indicating - Component Location** ON A/C 016-022, 024-150, 201-250
Figure 76(IAE)-00-00-11500-A / SHEET 1/1 - Throttle Control SystemFigure 76(IAE)-00-00-11900-A / SHEET 1/1 - Acquisition of the Discrete Signal by the FADECFigure 76(IAE)-00-00-13400-A / SHEET 1/1 - Control and Indicating - Component Location
76-10 - (IAE) - POWER CONTROL
76-10-00 - (IAE) - POWER CONTROL
76-10-00 PB 001 CONF 13 - POWER CONTROL - DESCRIPTION AND OPERATION
A. EPR Mode(1) Manual thrust setting mode (the autothrust function is not active)
The throttle control lever in the cockpit center pedestal controls:· the actual engine thrust setting· the selection of the thrust limit modeThe EEC:· receives the throttle lever angle· computes the engine thrust limit parameter and· adjusts the actual engine thrust parameter accordingly.
(2) Automatic thrust setting mode (the autothrust function is active)The throttle control lever controls:· the limitation of the actual thrust· the selection of the thrust limit mode.The FMGC computes the target thrust parameter and sends it to the EEC.The EEC adjusts the actual engine thrust parameter according to this value (Ref. 73-20).
The top limit value of the target thrust parameter is the actual position of the throttle control lever (this isapplicable when the alpha floor protection is not activated).When the alpha floor protection is activated the throttle control lever represents the lower limit of theautothrust demand.
B. N1 Reversionary ModeWhen N1 reversionary mode is selected, the automatic thrust setting mode (autothrust active) cannot beactivated.The throttle control lever in the cockpit center pedestal controls the actual thrust setting.The EEC receives the throttle lever angle and adjusts the actual engine thrust parameter according toambient conditions.
The throttle control system consist of:· the throttle control lever· the throttle control artificial feel unit· the throttle control unit· the electrical harnessIn addition each throttle control lever is fitted with an instinctive disconnect pushbutton switch.This pushbutton switch is used for the de-activation and disengagement of the autothrust function.The design of the throttle control is based upon a fixed throttle concept: this means that the throttle controllevers are not servo motorized.
2. Throttle Control Mechanical PartsA. Throttle Control Lever
(Ref. Fig. Acquisition of the Autothrust Instinctive Disconnect Signal by the FADEC SHEET 1)
INSTINCTIVE DISCONNECTPUSH BUTTON
(CO PILOT)
INSTINCTIVE DISCONNECTPUSH BUTTON
(PILOT)
FMGC 1MONITORCHANNEL
FMGC 1MONITOR
CHANNEL
FMGC 2MONITORCHANNEL
FMGC 2MONITORCHANNEL
ATHR ENG.
SBA
100101
110011
A
B
CONFIRM1S
CONFIRM15 S
FADEC RESET
FADEC
S
R
S
B8852
SET A
MAINTENANCE
FLAG (275/26)
S=1 MEANS
DEACTIVATE ATHR
FUNCTIONSET A
STATUS FLAG
"ATHR INOP"(146/23)
N_MM_761100_0_XCN0_01_00
Figure 76(IAE)-11-00-13000-B / SHEET 1/1 - Acquisition ofthe Autothrust Instinctive Disconnect Signal by the FADEC** ON A/C 016-022, 024-150, 201-250
The throttle control handle comprises:· A throttle control lever which incorporates stop devices· A graduated fixed sector· And autothrust instinctive disconnect pushbutton switch· A reverse latching lever.The throttle control lever moves over a range of 65 deg. from:· 20 deg. TLA (Full Reverser Throttle stop) to 45 deg. TLA (Full Forward Throttle stop).An intermediate mechanical stop is fitted at 0 deg. TLA.This stop is overriden when the reverse latching lever is pulled up for selection of the reverse power.This idle stop is reset as soon as the lever is selected back to forward thrust area.In the forward thrust area, there are two detent points:· MAX CLIMB detent point set at 25 deg. TLA· MAX CONTINUOUS/FLEX TAKE OFF detent point set at 35 deg. TLA.In the reverse thrust throttle range, there is one detent point set at -6 deg. TLA : this corresponds to theselection of the thrust reverser command and the Reverse Idle setting. From -20 deg. TLA to 0 deg. TLA,
the autothrust function cannot be activated.In the middle throttle range (0 deg. to 35 deg. TLA), the autothrust function can be active if engaged.This range corresponds to the selection of MAX CLIMB or MAX CONTINUOUS thrust limit mode, except theFLEX TAKE OFF mode.If the autothrust is not engaged, the engine control is manual.In the forward range (35 deg. to 45 deg. TLA), the autothrust function cannot be activated (except in alphafloor condition).The range over 35 deg. TLA corresponds to the selection of MAX TAKE OFF/ GO AROUND mode.The throttle control lever is linked to a mechanical rod. This rod drives the input lever of the throttle controlartificial feel unit.
B. Throttle Control Artificial Feel Unit(Ref. Fig. Throttle Control Artificial Feel Unit SHEET 1)
The Throttle control artificial feel unit is located below the cockpit center pedestal. This artificial feel unit isconnected to engine 1(2) throttle control lever and to the engine 1(2) throttle control unit by means of rods.The artificial feel unit is a friction system wich provides a load feedback to the throttle control lever.This artificial feel unit comprises two symetrical casings, one left and one right. Each casing contains anidentical and independent mechanism.Each mechanism is composed of:· a friction brake assembly· a gear assembly· a lever assembly· a bellcrank assembly
Throttle lever travel is transmitted to the to the artificial feel unit and to the throttle control unit.The linear movement of the throttle levers is transformed into a rotary movement at the belcrankwich turns about the friction brake assembly shaft. This movement rotates a toothed quadrantintegral with the shaft.This toothed quadrant causes inverse rotation of a gear equipped with a disk which has four
detent notches. Each notch corresponds to a throttle lever setting and is felt as a friction point atthe throttle levers.
C. Throttle Control Unit(Ref. Fig. Throttle Lever Angle Harness SHEET 1)
R 1
R3
S1
S3
S2S1
+
-TLA EXC
+
-TLA SIN
+
-TLA COS
CHANNEL B
TO SEC 1MON INPUTS
27 - 92
TO SEC 2MON INPUTS
27 - 92
TO SEC 3MON INPUTS
27 - 92
R 1
R3
S1
S3
S2S1
+
-TLA EXC
+
-TLA SIN
+
-TLA COS
CHANNEL A
8KS2CTL UNITTHROTTLE ENG211VU 210
4000KSECC ENG2
AB
C
F
G
J
KE
B
C
P
AE
S
R
D
J
H
G
T
N
K
L
U
V
AB
C
D
E
F
AB
C
D
E
F
N_MM_761100_0_XJM0_01_00
Figure 76(IAE)-11-00-13600-A / SHEET 1/1 - Throttle Lever Angle Harness** ON A/C 016-022, 024-150, 201-250
A mechanical rod transmits the throttle control lever movement.It connects the throttle control artificial feel unit to the input lever of the throttle control unit.The throttle control unit comprises:· an input lever· mechanical stops which limit the angular range· 2 resolvers whose signals are dedicated to the EEC (one resolver per channel of the EEC)· 6 potentiometers fitted three by three. Their signals are used by the flight control system· a device which drives the resolver and the potentiometer· a pin device for rigging the resolvers and potentiometers· a safety device which leads the resolvers outside the normal operating range in case of failure of the
driving device· two output electrical connectors.The input lever drives two gear sectors assembled face to face. Each sector drives itself a set of oneresolver and three potentiometers.The relationship between the throttle lever angle and resolver angle is linear and:
1 deg. TLA = 1.9 TRA.The accuracy of the throttle control unit (error between the input lever position and the resolver angle) is 0.5deg. TRA.The maximum discrepancy between the signals generated by the two resolvers is 0.25 deg. TRA. The TLAresolver operates in two quadrants : the first quadrant serves for positive angles and the fourth quadrant fornegative angles.Each resolver is dedicated to one channel of the EEC and receives its electrical excitation from the EEC.The EEC considers a throttle resolver angle value:· less than -41.0 deg. TRA or· greater than 88.0 deg. TRA as resolver position signal failure.The EEC incorporates a resolver fault accomodation logic. This logic allows engine operation after a failureor a complete loss of the throttle resolver position signal.
D. Electrical HarnessThere is one independent electrical harness dedicated to each TLA signal with its associated outputconnector.The electrical harness is a triplex twisted shielded pair of wires:· one pair for sine· one pair for cosine· one pair for excitation.
Figure 76(IAE)-11-00-11200-A / SHEET 1/1 - Throttle Control Mechanical PartsFigure 76(IAE)-11-00-12900-A / SHEET 1/1 - Throttle Control Artificial Feel UnitFigure 76(IAE)-11-00-13000-B / SHEET 1/1 - Acquisition of the Autothrust Instinctive Disconnect Signal by theFADECFigure 76(IAE)-11-00-13100-A / SHEET 1/1 - Throttle Control SystemFigure 76(IAE)-11-00-13600-A / SHEET 1/1 - Throttle Lever Angle HarnessFigure 76(IAE)-11-00-13700-A / SHEET 1/1 - Control Unit - Mechanical PartFigure 76(IAE)-11-00-13800-A / SHEET 1/2 - Throttle Control Power SuppliesFigure 76(IAE)-11-00-13800-A / SHEET 2/2 - Throttle Control Power Supplies
76-11-00 PB 501 CONF 13 - THROTTLE CONTROL - ADJUSTMENT/TEST
TASK 76-11-00-820-040-AAdjustment of the Mechanical Linkage
A. Put the throttle control lever in the IDLE STOP position and hold it in this position(Ref. Fig. Adjustment of the Mechanical Linkage SHEET 1)detail A.
(1) Make sure that you can easily install and remove the RIGGING PIN (98DNSA20208080)(98DNSA20208080) (5) in the artificial feel unit (1).If you can not do this, adjust the length of the rod (6).
Subtask 76-11-00-820-050-A
B. Preparation Before Adjustment.
(1) Remove the Multipurpose Control and Display Units 3CA1 and 3CA2 (Ref. AMM TASK 22-82-12-000-001)
(2) Remove the Radio Management Panels 1RG1 and 1RG2 (Ref. AMM TASK 23-13-13-000-001)
(3) Remove the Audio Control Panels 2RN1 and 2RN2 (Ref. AMM TASK 23-51-12-000-001)
(4) Remove the Weather Radar Control Unit 3SQ (Ref. AMM TASK 34-41-12-000-001)
(5) Remove the ATC Control Unit 3SH (Ref. AMM TASK 34-52-12-000-001)
(6) Remove the panels FLOOD LT/INTEG LT PNL 111VU and FLOOD LT PNL 112VU.(Ref. Fig. Ventilation Plates and Clamps SHEET 1)
NOTE: The removal procedure is the same for the FLOOD LT/INTEG LT PNL 111VU and theFLOOD LT PNL 112VU.
(a) Release the fasteners of the panel (1) and disengage the panel (1) from its housing.
(b) Disconnect the connector (3) from the panel (1).
(c) Remove the panel (1).
(d) Put CAP - BLANKING on the connectors (2) and (3).
(7) Remove the screws (14).
(8) Remove the ventilation plates (15).
(9) Disconnect the clamps (16).
(10) Remove the screws (10) and the washers (11).(Ref. Fig. Ventilation Plates and Clamps SHEET 1)
(11) Remove the plates (12) and (13).
(12) Cut and remove the lockwire and adjust the length of the adjustable rod (6)
(Ref. Fig. Adjustment of the Mechanical Linkage SHEET 1)detail B.
(13) Tighten and safety the hinge points and the adjustable rod ends with corrosion resistant steellockwire 0.8 mm dia (0.032 in.) .
Subtask 76-11-00-869-053-A
C. Precautions Before Adjustment.
(1) With the throttle control lever in the IDLE STOP position, make sure that you can :· easily install the pin (5) in the artificial feel unit (1)· easily remove this pin from the artificial feel unit (1)· install the pin again.
(2) Make sure that you can :· easily install the RIGGING PIN (98DNSA20206080) (98DNSA20206080) (3) in the throttle control
unit (4) and in the input lever,· easily remove this pin from these components.
If you can not do this, adjust the length of the rod (2).
Subtask 76-11-00-820-052-A
D. Adjustment of the Throttle Control.
(1) Cut and remove the lockwire and adjust the length of the adjustable rod (2).(Ref. Fig. Adjustment of the Mechanical Linkage SHEET 1)detail B.
(2) Disconnect the rod (2) from the throttle control unit and the artificial feel unit to install the corrosion
resistant steel lockwire 0.8 mm dia (0.032 in.) . Tighten and safety the hinge points adjustable rodends.
E. Remove the pin (5). With the throttle control lever in the IDLE STOP position make sure that you can :· easily remove the pin (3) from the throttle control unit,· easily install this pin in this unit. Remove this pin.
Subtask 76-11-00-869-055-A
F. Installation after Adjustment.
(1) Make sure that all the pins are removed.
(2) Install the plates (12) and (13).
(3) Install the screws (10) and washers (11).
(4) Install the clamps (16).
(5) Install the ventilation plates (15).
(6) Install the screws (14).
(7) Install the FLOOD LT/INTEG LT panel 111VU and the FLOOD LT panel 112VU.(Ref. Fig. Panels 111VU and 112VU SHEET 1)
NOTE: The installation procedure is the same for FLOOD LT/INTEG LT PNL 111VU and the FLOODLT PNL 112VU.
(a) Remove the blanking caps from the connectors (2) and (3).
(b) Install the connector (2) on the panel (1).
(c) Install the panel (1) on the structure.(d) Fully tighten the fasteners on the panel (1).
(e) Install the Multipurpose Control and Display Units (3CA1 and 3CA2). (Ref. AMM TASK 22-82-12-400-002)
(8) Install the Radio Management Panels (1RG1 and 1RG2) (Ref. AMM TASK 23-13-13-400-001)
(9) Install the Audio Control Panels (2RN1 and 2RN2) (Ref. AMM TASK 23-51-12-400-001)
(10) Install the Weather Radar Control Unit (3SQ) (Ref. AMM TASK 34-41-12-400-001)
(11) Install the ATC Control Unit (3SH) (Ref. AMM TASK 34-52-12-400-001)
5. Close-up
Subtask 76-11-00-410-051-AA. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 811.
(3) Remove the access platform(s).
(4) Remove the warning notice(s).
Subtask 76-11-00-865-052-A
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
121VU ENGINE/IGN/ENG2/SYS B 3JH2 P42121VU ENGINE/IGN/ENG1/SYS B 3JH1 P41
121VU ENGINE/IGN/ENG2/SYS A BAT 2JH2 P40
121VU ENGINE/IGN/ENG1/SYS A BAT 2JH1 P39
121VU FLIGHT CONTROLS/SEC3/SPLY 21CE3 Q19
121VU FLIGHT CONTROLS/SEC2/SPLY 21CE2 Q18
122VU LIGHTING/INSTL LT/MAIN INST/PNLAND/PED
4LF Y04
122VU LIGHTING/FLOOD/CTR INST/PNL 2LE Z04
Subtask 76-11-00-710-051-A
C. Do an operational test of the FLOOD LT/INTEG LT PNL 111VU and FLOOD LT PNL 112VU.
(1) Operate the light adjustment knobs of the FLOOD LT/INTEG LT PNL 111VU and FLOOD LT PNL112VU.
(2) Make sure that the light intensity of the GLARESHIELD 13VU, F/O GLARESHIELD PNL 130VU,CAPT GLARESHIELD PNL 131VU and OVERHEAD CTL & IND PNL 48VU changes.
TASK 76-11-00-820-041-AAdjustment of the Artificial Feel Unit
1. Reason for the JobSelf explanatory
2
Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
REFERENCE QTY DESIGNATION
No specific AR ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific AR SAFETY CLIP - CIRCUIT BREAKER
No specific AR WARNING NOTICE(S)
(98D76103000002) 1 MEASURE,LOAD-THROTTLE LEVER
B. Consumable Materials
REFERENCE DESIGNATIONNo specific corrosion resistant steel lockwire 0.8 mm dia (0.032 in.)
NOTE: This hard point includes the load measured in step (3).
(9) Block the adjustment system. Measure the load again to make sure that it is the same as the valuegiven in the step (8).
(10) Safety the lock nut (2) with corrosion resistant steel lockwire 0.8 mm dia (0.032 in.)
5. Close-up
Subtask 76-11-00-080-050-A
A. Remove the tool from the throttle control levers.
Subtask 76-11-00-865-054-A
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANEL DESIGNATION FIN LOCATION49VU ENGINE/1 AND 2/IGN/SYS A 1JH A03
49VU FLIGHT CONTROLS/SEC1/NORM/SPLY 21CE1 B08
121VU ENGINE/IGN/ENG2/SYS B 3JH2 P42
121VU ENGINE/IGN/ENG1/SYS B 3JH1 P41
121VU ENGINE/IGN/ENG2/SYS A BAT 2JH2 P40
121VU ENGINE/IGN/ENG1/SYS A BAT 2JH1 P39
121VU FLIGHT CONTROLS/SEC3/SPLY 21CE3 Q19
121VU FLIGHT CONTROLS/SEC2/SPLY 21CE2 Q18
Subtask 76-11-00-410-053-A
C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 811.
(3) Remove the access platform(s).
(4) Remove the warning notice(s).
TASK 76-11-00-710-040-AOperational Test of the Throttle Control Unit
1. Reason for the JobSelf explanatory
2Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
REFERENCE QTY DESIGNATION
No specific AR SAFETY CLIP - CIRCUIT BREAKER
B. Referenced Information
REFERENCE DESIGNATION
(Ref. 24-41-00-861-002-A). Energize the Aircraft Electrical Circuits from the External Power
(Ref. 24-41-00-861-002-A-01). Energize the Aircraft Electrical Circuits from the APU(Ref. 24-41-00-861-002-A-02). Energize the Aircraft Electrical Circuits from Engine 1(2)
122VU ANTI ICE/PROBES/2/TAT 1DA2 Y15122VU ANTI ICE/PROBES/2/PITOT 3DA2 Y14
122VU ANTI ICE/PROBES/2/AOA 4DA2 Y13
122VU ANTI ICE/PROBES/PHC/2 2DA2 Y12
122VU ANTI ICE/PROBES/2/STATIC 5DA2 Y11
122VU ANTI ICE/PROBES/3/PITOT 3DA3 Z16
122VU ANTI ICE/PROBES/3/AOA 4DA3 Z15
122VU ANTI ICE/PROBES/3/STATIC 5DA3 Z14
122VU ANTI ICE/PROBES/1/STATIC 5DA1 Z13
122VU ANTI ICE/PROBES/1/TAT 1DA1 Z12
FOR FIN 8KS1 (CTL UNIT-THROTTLE, ENG 1)
121VU ENGINE/IGN/ENG1/SYS B 3JH1 P41
121VU ENGINE/IGN/ENG1/SYS A BAT 2JH1 P39
FOR FIN 8KS2 (CTL UNIT-THROTTLE, ENG 2)
121VU ENGINE/IGN/ENG2/SYS B 3JH2 P42
121VU ENGINE/IGN/ENG2/SYS A BAT 2JH2 P40
4. Procedure
** ON A/C 201-250
(Ref. Fig. Upper Display Unit of the Ecam System EPR Indication SHEET 1)
** ON A/C 016-022, 024-150
(Ref. Fig. Upper Display Unit of the Ecam System EPR Indication SHEET 1)
** ON A/C 016-022, 024-150, 201-250
Subtask 76-11-00-710-050-A
A. Do this test:
ACTION RESULT
1.Move the ENG1 (ENG2) throttle control leversand make sure that the small white circle (THRREFERENCE) on the EPR indication follows thethrottle position on the upper ECAM DU.
2.Open the circuit breakers 2KS1, 2KS2. - EPR analog indication and the circle go out of view.- EPR digital indication is replaced by amber crosses.
- a message is displayed on the upper ECAM DUENG 1 FADEC A FAULTENG 2 FADEC A FAULT
NOTE: Ignore the Thrust Limit Mode indication onthe upper right of the ECAM DU.
3.Move the ENG1 (ENG2) throttle control leversand make sure that the thrust limit mode indicationand the EPR value limit follow the throttle positionon the upper ECAM DU.
4.Close the circuit breakers 2KS1, 2KS2. On upper ECAM DU,engine main parameters be-came in normal configuration
Open the circuit breakers 4KS1, 4KS2. On upper ECAM DU:-ENG1 FADEC B FAULT
NOTE: Ignore the Thrust Limit Mode indication onthe upper right of the ECAM DU.
5.Move the ENG1 (ENG2) throttle control leversand make sure that the small white circle (THRREFERENCE) on the EPR indication follows thethrottle position on the upper ECAM DU.
6.Close the circuit breakers 4KS1, 4KS2.On the upper ECAM DU:
ENG1 FADEC B FAULT goes out of view.
ENG2 FADEC B FAULT goes out of view.
NOTE: If the circuit breakers 4KS1,4KS2 stay openafter 1 minute,this message shows on theupper ECAM DU: C/B TRIPPED REAR PNLN-R
5. Close-up
Subtask 76-11-00-869-051-A
A. Put the aircraft back to its initial configuration.
(1) On the panel 50VU, release the ENG FADEC GND PWR 1 and 2 pushbutton switches (ONLEGENDS GOES OFF).
(2) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002) .
(3) Make sure that the work area is clean and clear of tools and other items.
Subtask 76-11-00-862-050-A
B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002) .
Subtask 76-11-00-865-069-A
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANEL DESIGNATION FIN LOCATION
49VU ENGINE/1 AND 2/IGN/SYS A 1JH A03
49VU ANTI ICE/PROBES/AOA/1 4DA1 D0449VU ANTI ICE/PROBES/PHC/1 2DA1 D03
(1) Make sure that the throttle control levers are set to idle (0 degrees TLA).
(2) Put a WARNING NOTICE(S) in the cockpit to tell persons not to move:· the throttle control levers· the slat and flaps control levers.
(3) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the forward avionicscompartment.
Subtask 76-11-00-010-050-A
B. Open the access door 811.
4. Procedure(Ref. Fig. Throttle Control System SHEET 1)
Subtask 76-11-00-210-050-A
A. Inspection of Trottle Control System.
(1) Visually examine the throttle control unit (4).
(a) Make sure that the mount nuts which attach the throttle control unit (4) to its support are notloose.
(b) Make sure that the four electrical connectors (5) are tighten.
(2) Visually examine the lower rods (3).
(a) Make sure that the upper and lower attachments of the rods are lockwired.
(b) Make sure that the rods can move freely on their bearings.
(3) Visually examine the upper rods (2).
(a) Repeat the same inspection as for the lower rods. For the upper attachment of the rods, use anLIGHT SOURCE - INSPECTION and an MIRROR - INSPECTION.
(4) Visually examine the bellcrank (6) of the throttle control lever.
(a) Make sure that there is no foreign object in the system and in its area.
(5) Visually examine the throttle control levers (1) in the cockpit for good condition.
(a) Make sure that there are no unwanted object which can prevent the full travel of the levers.
5. Close-up
Subtask 76-11-00-410-050-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 811.
(3) Remove the access platform(s).
(4) Remove the warning notice(s).Figure 76(IAE)-11-00-991-90900-A / SHEET 1/1 - Throttle Control System
76-11-17 - (IAE) - ARTIFICIAL FEEL UNIT - THROTTLE CONTROL
(3) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GNDPWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell
persons not to energize the FADEC 1(2).(4) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
Subtask 76-11-17-010-058-A
B. Make sure that the access door 811 is open.
Subtask 76-11-17-865-054-A
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
A. Installation of the Throttle Control Artificial Feel Unit:
(1) Install the throttle control artificial feel unit (23).
(2) Install the 2 bolts (24), 2 washers (22) and 2 nuts (21).
(3) If necessary bond the bushes (25) on the bolts (26) with Retaining adhesive-Cylindrical fitting Mediumstrength Low viscosity - (Material No. 05-ABF1).
(4) Install the 2 bolt assemblies (26), the 2 washers (20) and the 2 nuts (19).
(5) Tighten the 4 nuts.
(6) Install 4 new IPC -CSN (76-11-01-02-010) cotter pins (18).
(7) Install the 4 rods (27).
(8) If necessary bond the 4 bushes (16) on the 4 bolts (17) with Retaining adhesive-Cylindrical fittingMedium strength Low viscosity - (Material No. 05-ABF1)
(9) Install the 4 bolt assemblies (17), the 4 washers (15) and the 4 nuts (14).
(10) Tighten the 4 nuts.
Subtask 76-11-17-820-050-A
B. Precautions Before Adjustment.
(1) Make sure that you can easily install and remove the rigging pin RIGGING PIN (98DNSA20208120)(12) in the artificial feel unit (23).
(Ref. Fig. Throttle Control Rigging SHEET 1)If you can not do this, adjust the length of the rod (Ref. AMM TASK 76-11-00-820-040) .
(2) Make sure that you can easily install and remove the rigging pin RIGGING PIN (98DNSA20206080)(11) in the throttle control unit.(Ref. Fig. Throttle Control Rigging SHEET 1)If you can not do this, adjust the lenght of the rod (Ref. AMM TASK 76-11-00-820-040) .
Subtask 76-11-17-420-053-A
C. Install 4 new IPC -CSN (76-11-01-02-010) cotter pins (13).
Subtask 76-11-17-080-050-A
D. Remove the rigging pin (12) from the artificial feel unit and the rigging pin (11) from the throttle control unit.
Subtask 76-11-17-480-051-A
E. Install the MEASURE,LOAD-THROTTLE LEVER (98D76103000002) on the throttle control levers.
Subtask 76-11-17-820-051-A
F. Adjustment of the Artificial Feel Unit.
(1) Measure the value necessary to move the throttle control lever between the IDLE STOP and the MAXCLIMB.This value must be 0.85 and 1.05 daN.
NOTE: Measure this value in the IDLE STOP to MAX CLIMB range. Do not measure this value at thefriction point where the load increases suddenly.
(2) Measure the value necessary to move to more than MAX CLIMB friction point.This value must be 2.5 +0.1 -0 daN (5.62 +0.22 -0 lbf)
(3) If you do not get these values, adjust the artificial feel unit (Ref. AMM TASK 76-11-00-820-041)
Subtask 76-11-17-080-051-A
G. Remove the tool from the throttle control levers.
Subtask 76-11-17-869-053-A
H. Installation After Adjustment.
(1) Install the plates (4) and (10).(Ref. Fig. Ventilation Plates and Clamps SHEET 1)
(2) Install the washers (5) and the screws (6).
(3) Install the clamps (9).
(4) Install the ventilation plates (8).
(5) Install the screws (7).
(6) Install the FLOOD LT/INTEG LT panel 111VU and the FLOOD LT panel 112VU:(Ref. Fig. Panels 111VU and 112VU SHEET 1)
NOTE: The installation procedure is the same for the panels 111VU and 112VU.
(a) Remove the blanking caps from the connectors (2) and (3).
(7) Install the Multipurpose Control and Display Units (3CA1 and 3CA2). (Ref. AMM TASK 22-82-12-400-002) .
(8) Install the Radio Management Panels (1RG1 and 1RG2) (Ref. AMM TASK 23-13-13-400-001) .
(9) Install the Audio Control Panels (2RN1 and 2RN2) (Ref. AMM TASK 23-51-12-400-001) .
(10) Install the Weather Radar Control Unit (3SQ) (Ref. AMM TASK 34-41-12-400-001) .
(11) Install the ATC Control Unit (3SH) (Ref. AMM TASK 34-52-12-400-001)
5. Close-up
Subtask 76-11-17-410-054-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close the access door 811
(4) Remove the warning notice(s).
Subtask 76-11-17-865-055-A
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANEL DESIGNATION FIN LOCATION
49VU ENGINE/1 AND 2/IGN/SYS A 1JH A03
49VU FLIGHT CONTROLS/SEC1/NORM/SPLY 21CE1 B08
49VU LIGHTING/EMER LT/CKPT/DOME 1LE H08
105VU FLT CTL/SEC1/STBY SPLY 22CE B01
121VU ENGINE/IGN/ENG2/SYS B 3JH2 P42
121VU ENGINE/IGN/ENG1/SYS B 3JH1 P41
121VU ENGINE/IGN/ENG2/SYS A BAT 2JH2 P40
121VU ENGINE/IGN/ENG1/SYS A BAT 2JH1 P39
121VU FLIGHT CONTROLS/SEC3/SPLY 21CE3 Q19
121VU FLIGHT CONTROLS/SEC2/SPLY 21CE2 Q18
122VU LIGHTING/INSTL LT/MAIN INST/PNLAND/PED
4LF Y04
122VU LIGHTING/FLOOD/CTR INST/PNL 2LE Z04
Subtask 76-11-17-710-051-A
C. Do an operational test of the FLOOD LT/INTEG LT panel 111VU and FLOOD LT panel 112VU:
(1) operate the light adjustment knobs of the panels 111VU and 112VU.
(2) Make sure that the light intensity of the panels 13VU, 130VU, 131VU and 48VU changes.Figure 76(IAE)-11-17-991-90400-A / SHEET 1/1 - Panels 111VU and 112VUFigure 76(IAE)-11-17-991-90500-A / SHEET 1/1 - Ventilation Plates and ClampsFigure 76(IAE)-11-17-991-90600-A / SHEET 1/1 - Throttle Control RiggingFigure 76(IAE)-11-17-991-90700-A / SHEET 1/1 - Artificial Feel Unit
76-11-19 - (IAE) - CONTROL UNIT - THROTTLE
76-11-19 PB 401 CONF 13 - CONTROL UNIT - THROTTLE - REMOVAL/INSTALLATION
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do thisprocedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
(4) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
Subtask 76-11-19-865-054-A
B. Open, safety and tag this(these) circuit breaker(s):
PANEL DESIGNATION FIN LOCATION
49VU FLIGHT CONTROLS/SEC1/NORM/SPLY 21CE1 B08
105VU FLT CTL/SEC1/STBY SPLY 22CE B01
121VU FLIGHT CONTROLS/SEC3/SPLY 21CE3 Q19
121VU FLIGHT CONTROLS/SEC2/SPLY 21CE2 Q18
Subtask 76-11-19-010-052-A
C. Open the access door 811
Subtask 76-11-19-869-054-A
D. Make sure that the throttle control levers are set to idle (0 deg.TLA).
4. Procedure(Ref. Fig. Throttle Control Unit - Access and Location SHEET 1) (Ref. Fig. Throttle Control Unit - Removal/ Installation SHEET 1) (Ref. Fig. Throttle Control Unit - Rigging SHEET 1)
Subtask 76-11-19-020-053-B
A. Disconnect the five connectors (12).
(1) Put blanking caps on the disconnected electrical connector(s).
Subtask 76-11-19-480-050-A
B. Install the RIGGING PIN (98DNSA20208080) (98DNSA0208080) (13) in the artificial feel unit of thethrottle control.
Subtask 76-11-19-020-052-A
C. Removal of the Throttle Control Unit.
(1) Remove and discard the cotter pin (5).
(2) Remove the nut (6), the washer (7) and the bolt (2). Make sure that the bush (3) stays bonded to thebolt (2).
(3) Remove and discard the three cotter pins (8).
(4) Remove the three nuts (9), washers (10) and bolts (1) which attach the throttle control unit (11) to itssupport.
(5) Remove the throttle control unit 8KS1 (8KS2)(11).
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GNDPWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell
persons not to energize the FADEC 1(2).(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
(4) Make sure that the access door 811 is open.
(5) Make sure that the throttle control levers are set to idle (0 deg.TLA).
(6) Make sure that the RIGGING PIN (98DNSA20208150) (13) is installed in the artificial feel unit of thethrottle control.
Subtask 76-11-19-865-055-A
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANEL DESIGNATION FIN LOCATION
49VU FLIGHT CONTROLS/SEC1/NORM/SPLY 21CE1 B08
105VU FLT CTL/SEC1/STBY SPLY 22CE B01
121VU FLIGHT CONTROLS/SEC3/SPLY 21CE3 Q19
121VU FLIGHT CONTROLS/SEC2/SPLY 21CE2 Q18
Subtask 76-11-19-869-055-A
C. Make sure that the bush (3) is correctly bonded to the bolt (2).
(1) If necessary, bond the bush (3) to the bolt (2) with Retaining adhesive-Cylindrical fitting Mediumstrength Low viscosity - (Material No. 05-ABF1).
4. Procedure(Ref. Fig. Throttle Control Unit - Access and Location SHEET 1) (Ref. Fig. Throttle Control Unit - Removal/
Installation SHEET 1) (Ref. Fig. Throttle Control Unit - Rigging SHEET 1)
Subtask 76-11-19-420-052-B
A. Installation of the Throttle Control Unit.
(1) Remove all the blanking caps from the connectors.
(2) Install the throttle control unit 8KS1 (8KS2) (11) on its support.
(3) Install the three bolts (1) with the washers (10) and the nuts (9). Tighten the bolts (1).
(4) Install the three new IPC -CSN (76-11-01-03-010) cotter pins (8)
(5) Engage the rod (4) in the fork of the throttle control unit (11).
(6) Attach the rod to the fork with the bolt (2) equipped with the bush (3), the washer (7) and the nut (6).
Tighten the bolt.
(7) Connect the five electrical connectors (12). Tighten electrical connector fingertight plus one-eight turnusing soft nose pliers.
Subtask 76-11-19-820-050-A
B. Make sure that you can easily install and remove the RIGGING PIN (98DNSA20206080) (14). If notadjust the rod (12) (Ref. AMM TASK 76-11-00-820-040)
Subtask 76-11-19-420-053-A
C. Install a new IPC -CSN (76-11-01-02-010) cotter pin (5).
Subtask 76-11-19-080-050-A
D. Remove the RIGGING PIN (98DNSA20208150) (13) from the artificial feel unit.
E. Check of the Throttle Control Unit installation
(1) With the throttle control lever in idle position:
(a) Move the thrust reverser control lever to the full reverse position, then back to the idle position.Make sure that there are no hard and/or blocking points over the full travel range.
Subtask 76-11-19-865-056-A
F. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANEL DESIGNATION FIN LOCATION
49VU FLIGHT CONTROLS/SEC1/NORM/SPLY 21CE1 B08
105VU FLT CTL/SEC1/STBY SPLY 22CE B01
121VU FLIGHT CONTROLS/SEC3/SPLY 21CE3 Q19
121VU FLIGHT CONTROLS/SEC2/SPLY 21CE2 Q18
Subtask 76-11-19-710-051-A
G. Do an operational test of the throttle control unit (Ref. AMM TASK 76-11-00-710-040)
5. Close-up
Subtask 76-11-19-410-052-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 811
(3) Remove the warning notice(s).
(4) Remove the access platform(s).
Figure 76(IAE)-11-19-991-90500-A / SHEET 1/1 - Throttle Control Unit - Access and LocationFigure 76(IAE)-11-19-991-90600-B / SHEET 1/1 - Throttle Control Unit - Removal/InstallationFigure 76(IAE)-11-19-991-90700-A / SHEET 1/1 - Throttle Control Unit - Rigging
76-11-41 - (IAE) - LEVER ASSEMBLY - THROTTLE CONTROL
76-11-41 PB 401 CONF 13 - LEVER ASSEMBLY -
THROTTLE CONTROL - REMOVAL/INSTALLATION
TASK 76-11-41-000-041-ARemoval of the Throttle Control Lever Assembly
1. Reason for the JobSelf explanatory
2Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
REFERENCE QTY DESIGNATION
No specific AR ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
(1) Make sure that a WARNING NOTICE(S) is in the cockpit to tell persons not to move the slat and flapcontrol lever.
(2) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is inposition to tell persons not to start the engine.
(3) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GNDPWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tellpersons not to energize the FADEC 1(2).
(4) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
(5) Make sure that the access door 811 is open.
(6) Make sure that the Multipurpose Control and Display Units 3CA1 and 3CA2 (Ref. AMM TASK 22-82-12-000-001) are removed.
(7) Make sure that the Radio Management Panels 1RG1 and 1RG2 (Ref. AMM TASK 23-13-13-000-001) are removed.
(8) Make sure that the Audio Control Panels 2RN1 and 2RN2 (Ref. AMM TASK 23-51-12-000-001) areremoved.
(9) Make sure that the Weather Radar Control Unit 3SQ (Ref. AMM TASK 34-41-12-000-001) isremoved.
(10) Make sure that the ATC Control Unit 3SH (Ref. AMM TASK 34-52-12-000-001) is removed.
(11) Make sure that the panels 111VU and 112VU are removed.(12) Make sure that the throttle control levers are at idle (0 deg.TLA).
(13) Make sure that the rigging pin RIGGING PIN (98DNSA20208120) (98DNSA20208120) (11) isinstalled in the artificial feel unit.
Subtask 76-11-41-865-054-A
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
(Ref. Fig. Clamps and Connectors of the Throttle Control SHEET 1) (Ref. Fig. Throttle Controls - MinimumClearance SHEET 1)
Subtask 76-11-41-420-053-BA. Installation of the Throttle Control Lever Assembly:
(1) On the bellcrank (55), install a new IPC -CSN (76-11-01-01-310) bearing (50).(Ref. Fig. Lever Assembly SHEET 1)
(2) On the bellcrank (41), install a new IPC -CSN (76-11-01-01-310) bearing (40), the spacer (47) and anew IPC -CSN (76-11-01-01-310) bearing (48).
(3) Engage the shaft (54) and push it. At the same time install:
(a) the bushing (53),
(b) the bellcrank (55),
(c) the adjustment bushing (49),
(d) the bellcrank (41),
(e) the bushing (39).
(4) Push the shaft (54) and install the washer (38) and the nut (37).
(5) TORQUE the nut (37) to between 3 and 4 m.daN (22.12 and 29.50 lbf.ft) .
(6) Wirelock the nut (37) with lockwire (Material No. V99-999).
(7) Remove the blanking caps from the connectors 2145VC and 2146VC.(Ref. Fig. Clamps and Connectors of the Throttle Control SHEET 1)
(8) Connect the connectors 2145VC and 2146 VC.
(9) Install the clamps (82), the washers (81) and (83) and the screws (80).
(10) Install the clamps (77), the washers (78) and (79) and the screw (76).
(11) Install the rocker (57) and the pin (59).(Ref. Fig. Lever Assembly SHEET 1)
(12) Install the link (25), the roller (65), the bushing (66), the screw (64), the bushing (61), the roller (60),the washer (73) and the nut (74).
(13) Install 2 new IPC -CSN (76-11-01-01-230) cotter pins (72).
(14) Install the 2 forward covers (63) and the 2 aft, covers (42).
(15) Install the 8 screws (46), the 8 washers (45) and the 8 nuts (44).
(16) Install 8 new IPC -CSN (76-11-01-01-230) cotter pins (43).
Subtask 76-11-41-220-051-A
B. Make sure there is a minimum clearance of 3 mm (0.12 in.) between the 2 screws (64) and the 8 screws(46).(Ref. Fig. Throttle Controls - Minimum Clearance SHEET 1)If not install a new IPC -CSN (76-11-01-01-110) adjustment bushing (49).
Subtask 76-11-41-420-054-A
C. Installation of the Housing.(Ref. Fig. Throttle Control SHEET 1)
(1) Connect the connector 21LFA (19) on the housing (18) and tighten the nut of the connector.
(2) Install the IPC -CSN (33-13-08-03-110) lighted label (86) on the housing (18).
(1) Install the lever (29). To do this push the lever to connect the connector located inside at the lever-to-bellcrank junction.
(2) Apply Threadlocking Adhesive-- Medium strength - (Material No. 05-BAE1) on the 2 screws (15).
(3) Install the 2 screws (15) and the 2 hollow pins (13).
(4) Assemble the trigger (27) and the link (25) with the pin (26).
(5) Engage the trigger (27) in the lever (29) and install the hollow pin (24) and the screw (28).
(6) Install the index (16) and the 2 screws (14).
(7) Install the index (22) and the 2 screws (23).
(8) Put the two control levers in the idle position (0 deg.TLA) and engage the two links.
(9) If necessary install 2 new bushings (33) on the screws (34) and bond them with Retaining adhesive-Cylindrical fitting Medium strength Low viscosity - (Material No. 05-ABF1)
(10) Install the 2 screws (34), the 2 washers (32) and the 2 nuts (31).
(11) Install 2 new IPC -CSN (76-11-01-01-010) cotter pins (30).
Subtask 76-11-41-080-050-A
E. Remove the rigging pin (11) from the artificial feel unit.
5. Close-up
Subtask 76-11-41-410-052-A
A. Close Access
(1) Install the pitch trim control mechanism (Ref. AMM TASK 27-41-41-400-001) .
(2) Install the plates (4) and (10).(Ref. Fig. Ventilations Plates and Clamps SHEET 1)
(3) Install the screws (6) and the washers (5).
(4) Install the clamps (9).
(5) Install the ventilation plates (8).
(6) Install the screws (7).
(7) Install the panels 111VU and 112VU.(Ref. Fig. Panels 111VU and 112VU SHEET 1)
NOTE: The installation procedure is the same for the panels 111VU and 112VU.
(a) Remove the blanking caps from the connectors (2) and (3).
(b) Install the connector (2) on the panel (1).
(c) Install the panel (1) on the structure.
(d) Fully tighten the fasteners on the panel (1).
(8) Install the Multipurpose Control and Display Units (3CA1 and 3CA2) (Ref. AMM TASK 22-82-12-400-002) .
(9) Install the Radio Management Panels (1RG1 and 1RG2) (Ref. AMM TASK 23-13-13-400-001) .
(10) Install the Audio Control Panels (2RN1 and 2RN2) (Ref. AMM TASK 23-51-12-400-001) .
(11) Install the Weather Radar Control Unit (3SQ) (Ref. AMM TASK 34-41-12-400-001) .
(12) Install the ATC Control Unit (3SH) (Ref. AMM TASK 34-52-12-400-001) .
Subtask 76-11-41-410-053-A
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close the access door 811.
(4) Remove the warning notice(s).
Subtask 76-11-41-865-055-AC. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANEL DESIGNATION FIN LOCATION
49VU ENGINE/1 AND 2/IGN/SYS A 1JH A03
49VU FLIGHT CONTROLS/SEC1/NORM/SPLY 21CE1 B08
49VU LIGHTING/EMER LT/CKPT/DOME 1LE H08
105VU FLT CTL/SEC1/STBY SPLY 22CE B01
121VU ENGINE/IGN/ENG2/SYS B 3JH2 P42
121VU ENGINE/IGN/ENG1/SYS B 3JH1 P41
121VU ENGINE/IGN/ENG2/SYS A BAT 2JH2 P40
121VU ENGINE/IGN/ENG1/SYS A BAT 2JH1 P39121VU FLIGHT CONTROLS/SEC3/SPLY 21CE3 Q19
121VU FLIGHT CONTROLS/SEC2/SPLY 21CE2 Q18
122VU LIGHTING/INSTL LT/MAIN INST/PNLAND/PED
4LF Y04
122VU LIGHTING/FLOOD/CTR INST/PNL 2LE Z04
Subtask 76-11-41-710-051-A
D. Do the test that follows:
(1) Do an operational test of the panels 111VU and 112VU:
(a) Operate the light adjustment knobs of the panels 111VU and 112VU.
(b) Make sure that the light intensity of the panels 13VU, 130VU, 131VU and 48VU changes.(2) Do the operational test of the AFS (Ref. AMM TASK 22-96-00-710-001) .
NOTE: If the aircraft is operated in cat 3 conditions, do the LAND CAT 3 capability test (Ref. AMM TASK 22-97-00-710-001) .
The HP fuel shut off valve control is fully electrical. It is performed from the engine panel in the cockpit asfollows:· opening of the HP fuel SOV:
This is controlled by the EEC : the EEC receives the commands from the MASTER controlswitch and ignition selector switch.
· closure of the HP fuel SOV:This is controlled directly from the MASTER control switch in OFF position (Ref. 73-20-00 and80-00-00).The MASTER control switches are part of the panel 115VU.
B. Valve OperationThe aircraft provides 28 Volt DC power to the EEC for operation of the engine HP fuel shut off valve latchingtorque motor.Two coils of the latching torque motor are operated by the EEC (1 per channel). Each coil provides the ONand OFF function depending upon the current polarity sent from the EEC.One additional coil is controlled by the hardwired fuel-off input from the cockpit. When the ENG MASTER
control switch is set on OFF position, an automatic shut-off of the FMU closure valve-solenoid supply isachieved by a time-delay relay. This opening time relay enables the power supply to be shut off 2 minutesafter the engine shutdown.The EEC Unit receives a feedback position signal from the HP fuel shut off valve indicating whether thevalve is in the closed or open position ; the EEC generates also a disagree signal for cockpit indication.In case of loss of aircraft power supply, the HP fuel valve remains in the same position as before the failure.A spurious EEC unit signal cannot open the fuel valve when commanded off by the MASTER lever.When the HP fuel shut off valve is selected open a spurious transient voltage on the OFF coil will not causethe permanent closure of the HP fuel valve.The cockpit commanded OFF coil has priority over EEC commanded coils.The connector for the fuel shutoff solenoid is located on the fuel metering unit.
2. LP Fuel Shut Off Valve Control
A. GeneralThe function of the LP fuel shut-off valve is to control the fuel supply at engine-to-pylon interface.The valve is located on the engine fuel supply system in the wing leading edge.
B. Valve Operation(Ref. Fig. HP and LP Fuel Shut Off Valves - Power Supplies SHEET 1)The LP fuel shut off valve is controlled:· From the cockpit overhead panel 20VU by means of the ENG FIRE pushbutton switch· From the cockpit center pedestal 115VU by means of the MASTER control switch on, the ENG panel.
Figure 76(IAE)-12-00-11700-B / SHEET 1/1 - HP and LP Fuel Shut Off Valves - Power Supplies