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05-10-00Operating Limitsand LeadingParticulars

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PRATT & WHITNEY CANADAMAINTENANCE MANUAL

MANUAL PART NO. 3037332

LIST OF EFFECTIVE PAGES

Page 1/205-10 LEP Dec 04/2009

P&WC Proprietary Information. Subject to the restrictions on the title page.

OPERATING LIMITS AND LEADING PARTICULARS 05-10-00

1. General 1

2. Operating Limits and Leading Particulars 1

A. Operating Limits 1

B. Overtorque Limits 1

C. Overtemperature Limits 1

D. Overspeed limits 1

E. Normal Take-off Temperature Limit 2

F. Leading Particulars 2

TABLE OF CONTENTSSUBJECT PAGE



Page 1/205-10 CONTENTS Dec 04/2009


OPERATING LIMITS AND LEADING PARTICULARS

1. General

The Operating Limits and Leading Particulars contain the limits approved by TransportCanada.

2. Operating Limits and Leading Particulars

A. Operating Limits

(1) Engine operating limits for the PW124B (BS724/BS726/BS896) engine are detailedin Table 1.

(2) Engine operating limits for the PW127 (BS774) engine are detailed in Table 2.

(3) Engine operating limits for the PW127E (BS850/BS1034) engine are detailed in Table3.

(4) Engine operating limits for the PW127F (BS918/BS1033) and PW127M (BS1237)engines are detailed in Table 4.

B. Overtorque Limits

(1) Overtorque limits for the PW124B (BS724/BS726/BS896) engine are detailed inFigure 1.

(2) Overtorque limits for the PW127 (BS774), PW127F (BS918/BS1033) and PW127M(BS1237) engines are detailed in Figure 2.

(3) Overtorque limits for the PW127E (BS850/BS1034) engine are detailed in Figure3′.

C. Overtemperature Limits

Overtemperature limits for the PW124B (BS724/BS726/BS896), PW127 (BS774),PW127E (BS850/BS1034), PW127F (BS918/BS1033) and PW127M (BS1237) enginesare detailed in Figure 4.

D. Overspeed limits

(1) Overspeed limits for the PW124B (BS724/BS726/BS896) engine are detailed inFigure 5.

(2) Overspeed limits for the PW127 (BS774) and PW127E (BS850/BS1034)engine aredetailed in Figure 6.

(3) Overspeed limits for the PW127F (BS918/BS1033) and PW127M (BS1237) enginesare detailed in Figure 7.



05-10-00 Page 1OPERATING LIMITS AND LEADING PARTICULARS Dec 04/2009


E. Normal Take-off Temperature Limit

Normal Take-off ITT/T6 limits for the PW127 (BS774), PW127E (BS850/BS1034),PW127F (BS918/BS1033) and PW127M (BS1237) engines are detailed in Figure 8.

F. Leading Particulars

(1) Engine leading particulars for the PW124B (BS724/BS726/BS896) engine aredetailed in Table 5.

(2) Engine leading particulars for the PW127 (BS774) engine are detailed in Table 6.

(3) Engine leading particulars for the PW127E (BS850/BS1034) engine are detailed inTable 7.

(4) Engine leading particulars for the PW127F (BS918/BS1033) and PW127M(BS1237) engines are detailed in Table 8.

G.

TABLE 1, Operating Limits - PW124B (BS724/BS726/BS896) Engines

STEADY STATE TRANSIENT

NH Maximum 34200 rpm - 102.7% 34550 rpm - 103.7%20 secs. Max.

NP Maximum 1212 rpm - 101% 1320 rpm - 110%(Ref. NOTE 4)1380 rpm - 115%(Ref. NOTE 5)1229 rpm - 102.5%(Ref. NOTE 6)

NL Maximum 28800 rpm - 104% 28900 rpm - 104.3%20 Sec. Max.

G.I. NH (Min. idle) 21978 rpm - 66% Min.

Torque Maximum Ref. Fig. 1 Ref. Fig. 1

ITT/T6 Maximum 800°C (1472°F) Ref. Fig. 4

ITT/T6 During Start 840°C (1544°F) 20 secs.950°C (1742°F) 5 secs.

Ref. Fig. 4

ITT Limit (‘‘Hotel’’ mode) 715°C (1319°F)

Oil Temperature 115°C (239°F) Max.0°C (32°F) Min.Starting -54°C (-65°F) Min.,G.I. -40°C (-40°F) Min.

125°C (257°F)(Ref. NOTES 1 and 2).

Oil Pressure 55-65 psid above flight idle(Ref. NOTE 3)40 psid Min.below flight idle

40 - 100 psid20 secs Max.





TABLE 1, Operating Limits - PW124B (BS724/BS726/BS896) Engines (Cont’d)


Max. Oil Consumption(over 10 hour period)

0.500 lb./hr. (0.227 kg/hr)

Inlet fuel temperature -54°C (-65°F) Min., +57°C (+135°F) Max.

NOTE: 1. Sustained running at an oil temperature between 115 and 125°C (239 and 257°F) islimited to 20 minutes, except when in ’Hotel’ mode.

NOTE: 2. During ’Hotel’ mode operation, the engine oil temperature limit is 120°C (248°F) for anunlimited time. Sustained running at a temperature between 120 and 125°C (248 and257°F) is limited to 20 minutes.

NOTE: 3. Psid = difference between oil delivery pressure and pressure in No. 3 and 4 bearingcavity.

NOTE: 4. Overspeed due to propeller malfunction. Permissible to complete flight. Power mustbe set not to exceed takeoff or normal takeoff or maximum continuous or maximumclimb or maximum cruise rating as applicable. On-wing maintenance is required.

NOTE: 5. Overspeed due to propeller malfunction. Permissible to complete flight. Power mustbe set not to exceed takeoff or normal takeoff or maximum continuous or maximumclimb or maximum cruise rating as applicable. Engine must be inspected inaccordance with overhaul manual instructions.

NOTE: 6. Overspeed due to propeller malfunction. Permissible to complete flight. Power mustbe set not to exceed takeoff or normal takeoff or maximum continuous or maximumclimb or maximum cruise rating as applicable. No maintenance action required.

TABLE 2, Operating Limits - PW127 (BS774) Engines



NP Maximum 1212 rpm - 101% 1272 rpm - 106%(Ref. NOTE 3)1440 rpm - 120%5 Sec. Max.1296 rpm - 108%20 Sec. Max.(Ref. NOTE 4)

NL Maximum 28870 rpm -104.2% 29575 rpm -106.8%20 Secs. Max

G.I. NH (Min. idle) 21978 rpm - 66% Min.







TABLE 2, Operating Limits - PW127 (BS774) Engines (Cont’d)


Normal TakeoffITT/T6 Maximum

Depending on OAT(Ref. Fig. 8)

Ref. Fig. 4


Ref. Fig. 4

ITT Limit (‘‘Hotel’’ mode) 715°C (1319°F)

Oil Temperature 125°C (257°F) Max.(Ref. NOTE 1)0°C (32°F) Min.Starting -54°C (-65°F) Min.G.I. -40°C (-40°F) Min.

140°C (284°F)(Ref. NOTE 1).


40 - 100 psig20 secs Max.

Max. Oil Consumption(Over 10 hour period)

0.500 lb./hr. (0.227 kg/hr)


NOTE: 1. Sustained running at an oil temperature between 125 and 140°C (257 and 284°F) islimited to 20 minutes.


NOTE: 3. Overspeed due to propeller malfunction. Permissible to complete flight. Power mustbe set not to exceed takeoff or normal takeoff or maximum continuous or maximumclimb or maximum cruise rating as applicable. No engine maintenance actionrequired.

NOTE: 4. Maximum ITT of 781°C (1438°F)

TABLE 3, Operating Limits - PW127E (BS850/BS1034) Engines



NP Maximum 1212 rpm - 101.09 % 1272 rpm - 106%(Ref. NOTE 3)1440 rpm - 120%5 secs. Max.1296 rpm- 108%20 Sec. Max.(Ref. NOTE 4)





TABLE 3, Operating Limits - PW127E (BS850/BS1034) Engines (Cont’d)


NL Maximum 28870 rpm - 104.2 % 29575 rpm - 106.8%20 secs. Max.

G.I. - NH (Min. idle) 21978 rpm - 66% Min. -




Depending on OAT.(Ref. Fig. 8)

Ref. Fig. 4


Ref. Fig. 4

ITT limit (Hotel mode) 715°C (1319°F)

Oil Temperature 125°C (257°F) Max.(Ref. NOTE 1)0°C (32°F) Min.Starting -54°C (-65°F) Min.G.I -40°C (-40°F) Min.

140°C (284°F)(Ref. NOTE 1).




0.500 lb./hr. (0.227 kg/hr)






TABLE 4, Operating Limits - PW127F (BS918/BS1033) and PW127M (BS1237) Engines







TABLE 4, Operating Limits - PW127F (BS918/BS1033) and PW127M (BS1237)Engines (Cont’d)


NP Maximum 1212 rpm - 101.09 % 1272 rpm - 106%(Ref. NOTE 3)1440 rpm - 120%5 secs. Max.1296 rpm - 108%20 secs. Max.(Ref. NOTE 4)

NL Maximum 28870 rpm - 104.2 % 29575 rpm - 106.8%20 secs. Max.

G.I. - NH (Min. idle) 21978 rpm - 66% Min. -




Depending on OAT.(Ref. Fig. 8)

Ref. Fig. 4


Ref. Fig. 4

ITT limit (Hotel mode) 715°C (1319°F)

Oil Temperature 125°C (257°F) Max.(Ref. NOTE 1)0°C (32°F) Min.Starting -54°C (-65°F) Min.G.I -40°C (-40°F)

140°C (284°F)(Ref. NOTE 1).




0.500 lb./hr. (0.227 kg/hr)










TABLE 5, Engine Specifications and Leading Particulars - PW124B (BS724/BS726/BS896)Engines

RATING

SHAFT POWER PERFORMANCE SPECIFIC FUELCONSUMPTION

(lb./eshp/hr.)

JETTHRUST

(lbs.)ESHP SHPSea Level Static ICAO Standard Atmosphere ConditionsTake-off 2522 2400 (1) 0.468 305Normal Take-off (2) 2272 2160 (3) 0.482 279Max. Continuous 2345 2230 (4) 0.483 277Max. Climb 2197 2088 (5) 0.487 272Max. Cruise 2136 2030 (6) 0.492 266(1) Available to 34.4°C (94°F) at 1200 NP.(2) Normal takeoff power is the maximum power to be set during routine takeoffs. The controlsystem automatically increases power up to 10% on receipt of a signal indicating a power losson the opposite engine.(3) Available to 34.4°C (94°F) at 1200 NP.(4) Available to 45.0°C (113°F) at 1200 NP.(5) Available to 28.3°C (83°F) at 1200 NP.(6) Available to 22.2°C (72°F) at 1200 NP.Type of Combustion Chamber Annular, Reverse FlowPropeller Shaft Rotation (viewed from rear of engine) ClockwisePropeller Shaft Coupling FlangedEngine Height (approx.) 33 inches (838.2 mm)Engine Width (approx.) 26 inches (660.4 mm)Engine Length (approx.) 84 inches (2134 mm)Dry Weight (excluding additional equipment) 1060 lbs. (480.8 kg)Reduction Gearbox Ratio 16.68:1Usable Oil 2.164 US Gal. (8.192 liters)Oil System Capacity 38.3 lbs. (17.39 kg)Drainable Oil (excluding oil lines) 27.3 lbs. (12.34 kg)Direction of Rotation (Accessory Drives),Facing Pad, and Speed:AC Generator CW/8438 rpmOverspeed Governor and Oil Pump CCW/5400 rpmPropeller Control Unit CW/1200 rpmStarter motor CW/12241 rpmFuel Pump /MFCU CW/4365 rpmAcceptable drive seal leakage rate:-Fuel Pump Drain 7 cc/hr-Starter Driveshaft 3 cc/hr-Propeller Shaft Seal 5 cc/hr-All Unspecified Seals 3 cc/hr/seal





TABLE 6, Engine Specifications and Leading Particulars - PW127 (BS774) Engines

RATING


(lb./eshp/hr.)

JETTHRUST

(lbs.)ESHP SHPSea Level Static ICAO Standard Atmosphere ConditionsTake-off 2880 2750 (1) 0.459 325Normal Take-off (2) 2593 2475 (1) 0.470 297Max. Continuous 2619 2500 (3) 0.469 299Max. Climb 2299 2192 (4) 0.486 268Max. Cruise 2237 2132 (5) 0.491 262(1) Available at 31.6°C (88.9°F) at 1200 NP.(2) Normal take-off power is the maximum power to be set during routine take-offs. The controlsystem automatically increases power up to 10% on receipt of a signal indicating a power losson the opposite engine.(3) Available to 41.4°C (106.5°F) at 1200 NP.(4) Available to 28.4°C (83.1°F) at 1200 NP.(5) Available to 22.8°C (73.1°F) at 1200 NP.Type of Combustion Chamber Annular, Reverse FlowPropeller Shaft Rotation (viewed from rear of engine) ClockwisePropeller Shaft Coupling FlangedEngine Height (approx.) 33 inches (838.2 mm)Engine Width (approx.) 26 inches (660.4 mm)Engine Length (approx.) 84 inches (2134 mm)Dry Weight (excluding additional equipment) 1060 lbs. (480.8 kg)Reduction Gearbox Ratio 16.68:1Usable Oil 2.164 US Gal. (8.192 liters)Oil System Capacity 38.3 lbs. (17.39 kg)Drainable Oil (excluding oil lines) 27.3 lbs. (12.34 kg)Direction of Rotation (Accessory Drives),Facing Pad, and Speed:AC Generator CW/8438 rpmOverspeed Governor and Oil Pump CCW/5440 rpmPropeller Control Unit CW/1200 rpmStarter motor CW/12241 rpmFuel Pump/MFCU CW/4365 rpmAcceptable drive seal leakage rates:-Fuel Pump Drain 7 cc/hr-Starter Driveshaft 3 cc/hr-Propeller Shaft Seal 5 cc/hr-All Unspecified Seals 3 cc/hr/seal





TABLE 7, Engine Specifications and Leading Particulars - PW127E (BS850/BS1034) Engines

RATING


(lb./eshp/hr.)

JETTHRUST

(lbs.)ESHP SHPSea Level Static ICAO Standard Atmosphere ConditionsTake-off 2516 2400 (1) 0.474 289Normal Take-off (2) 2266 2160 (1) 0.489 265Max. Continuous 2516 2400 (1) 0.474 289Max. Climb 2266 2160 (3) 0.489 268Max. Cruise 2237 2132 (4) 0.491 262(1) Available to 45.0°C (113.0°F) at 1212 NP.(2) Normal take-off power is the maximum power to be set during routine take-offs. The controlsystem automatically increases power up to 10% on receipt of a signal indicating a power losson the opposite engine.(3) Available to 25.0°C (77.0°F) at 1212 NP.(4) Available to 25.5°C (87.9°F) at 1212 NP.Type of Combustion Chamber Annular, Reverse FlowPropeller Shaft Rotation (viewed from rear of engine) ClockwisePropeller Shaft Coupling FlangedEngine Height (approx.) 33 inches (838.2 mm)Engine Width (approx.) 26 inches (660.4 mm)Engine Length (approx.) 84 inches (2134 mm)Dry Weight (excluding additional equipment) 1060 lbs. (480.8 kg)Reduction Gearbox Ratio 16.68:1Usable Oil 2.164 US Gal. (8.192 liters)Oil System Capacity 38.3 lbs. (17.39 kg)Drainable Oil (excluding oil lines) 27.3 lbs. (12.34 kg)Direction of Rotation (Accessory Drives),Facing Pad, and Speed:AC Generator CW/8483 rpmOverspeed Governor and Oil Pump CCW/5440 rpmPropeller Control Unit CW/1200 rpmStarter motor CW/12241 rpmFuel Pump /MFCU CW/4365 rpmAcceptable drive seal leakage rates:-Fuel Pump Drain 7 cc/hr-Starter Driveshaft 3 cc/hr-Propeller Shaft Seal 5 cc/hr-All Unspecified Seals 3 cc/hr/seal





TABLE 8, Engine Specifications and Leading Particulars - PW127F (BS918/BS1033) andPW127M (BS1237) Engines

RATING

SHAFT POWER PERFORMANCEat 1200 RPM SPECIFIC FUEL

CONSUMPTION(lb./eshp/hr.)

JETTHRUST

(lbs.)ESHP SHPSea Level Static ICAO Standard Atmosphere ConditionsTake-off 2880 2750 (1) 0.459 325Normal Take-off (2) 2593 2475 (1) 0.470 297Max. Continuous 2619 2500 (3) 0.469 299Max. Climb 2299 2192 (4) 0.486 268Max. Cruise 2237 2132 (5) 0.491 262(1) Available to 34.9°C (94.8°F).(2) Normal take-off power is the maximum power to be set during routine take-offs. The controlsystem automatically increases power up to 10% on receipt of a signal indicating a power losson the opposite engine.(3) Available to 44.4°C (111.9°F).(4) Available to 26.6°C (79.8°F).(5) Available to 22.6°C (72.6°F).Type of Combustion Chamber Annular, Reverse FlowPropeller Shaft Rotation (viewed from rear of engine) ClockwisePropeller Shaft Coupling FlangedEngine Height (approx.) 33 inches (838.2 mm)Engine Width (approx.) 26 inches (660.4 mm)Engine Length (approx.) 84 inches (2134 mm)Dry Weight (excluding additional equipment) 1060 lbs. (480.8 kg)Reduction Gearbox Ratio 16.68:1Usable Oil 2.164 US Gal. (8.192 liters)Oil System Capacity 38.3 lbs. (17.39 kg)Drainable Oil (excluding oil lines) 27.3 lbs. (12.34 kg)Direction of Rotation (Accessory Drives),Facing Pad, and Speed:AC Generator CW/8438 rpmOverspeed Governor and Oil Pump CCW/5440 rpmPropeller Control Unit CW/1200 rpmStarter motor CW/12241 rpmFuel Pump /MFCU CW/4365 rpmAcceptable drive seal leakage rates:-Fuel Pump Drain 7 cc/hr-Starter Driveshaft 3 cc/hr-Propeller Shaft Seal 5 cc/hr-All Unspecified Seals 3 cc/hr/seal





NOTE 1:

NOTE 2:

MAGNITUDE AND DURATION OF ALL OVERTORQUES IN AREAS A, B, C AND D MUST BE RECORDED IN TURBOMACHINERY/ REDUCTION GEARBOX LOG BOOKS, EXCEPT WHERE NOTE 2 APPLIES.

NOTE 4: 100% TORQUE = 10504 LB.FT.

AREA :

1. ALLOWABLE TIME−LIMITED TORQUE TRANSIENTS. (SEE NOTE 2)2. NO UNSCHEDULED MAINTENANCE ACTION REQUIRED.

1. INVESTIGATE AND CORRECT CAUSE OF OVERTORQUE.

%TORQUE

20 60 120 180 240 300TIME (SEC.)

WHEN NP IS BELOW 86%.

NOTE 3: SERVICE EXPERIENCE HAS SHOWN OVERTORQUES IN AREA CDO NOT AFFECT AIRWORTHINESS. HOWEVER, THE ACCELERATEDWEAR INVOLVED MAY NOT BE COVERED BY WARRANTY.

1. INVESTIGATE AND CORRECT CAUSE OF OVERTORQUE.2. CARRY OUT MAINTENANCE ACTIONS SPECIFIED IN

2. CARRY OUT MAINTENANCE ACTIONS SPECIFIED IN

160.0

150.0

140.0

130.0

120.0

110.0

170.0

124.5

106.3

100.0

CHAPTER 5−50−00.


600

135.0

165.0

155.0

145.0

OPERATION UP TO 102.3% TORQUE IS TIME UNLIMITED

1. INVESTIGATE AND CORRECT CAUSE OF OVERTORQUE.2. REMOVE ENGINE AND RETURN TO AN OVERHAUL FACILITY

FOR INSPECTION.

A

B

C

D

D

D

A

B

C

D

AREA :

AREA :

AREA :

C31952H

PW124B (BS724/BS726/BS896) Engine Overtorque LimitsFigure 1





NOTE 1:

NOTE 3:

MAGNITUDE AND DURATION OF ALL OVERTORQUES IN AREASA, B, C AND D MUST BE RECORDED IN TURBOMACHINERY/

SERVICE EXPERIENCE HAS SHOWN OVERTORQUES IN AREA C

REDUCTION GEARBOX LOG BOOKS, EXCEPT WHERE NOTE 2 APPLIES.

DO NOT AFFECT AIRWORTHINESS. HOWEVER, THE ACCELERATEDWEAR INVOLVED MAY NOT BE COVERED BY WARRANTY.


AREA A:

AREA B:

AREA C:

AREA D:

1. ALLOWABLE TIME−LIMITED TORQUE.2. NO UNSCHEDULED MAINTENANCE ACTION REQUIRED.




2. CARRY OUT MAINTENANCE ACTIONS SPECIFIED IN CHAPTER 5−50−00.

(SEE NOTE 2)

NOTE 2: OPERATION UP TO 106.3% TORQUE IS TIME UNLIMITED WHENNP IS BELOW 94%


3. AREA A IS NOMINALLY LIMITED TO 5 MINUTES DURATION BUT MAYBE USED UP TO 10 MINUTES FOR ONE ENGINE INOPERATIVE OPERATION.

D

%TORQUE

20 60 120 180 240 300TIME (SEC.)

106.3

100.0

150.0

140.0

130.0

120.0

600

C

B

A B

1. INVESTIGATE AND CORRECT CAUSE OF OVERTORQUE.REMOVE REDUCTION GEARBOX (RGB) MODULE AND INSPECT/REPAIRIN ACCORDANCE WITH OVERHAUL MANUAL INSTRUCTIONS

2..

NOTE 5: PW127E TORQUE LIMIT IS APPLICABLE WHEN PW127M OPERATES AS PW127E.

C29698A

PW127 (BS774), PW127F (BS918/BS1033) and PW127M (BS1237) Engine Overtorque LimitsFigure 2





NOTE 1:

NOTE 3:

MAGNITUDE AND DURATION OF ALL OVERTORQUES IN AREASA, B, C AND D MUST BE RECORDED IN TURBOMACHINERY/

SERVICE EXPERIENCE HAS SHOWN OVERTORQUES IN AREA C

REDUCTION GEARBOX LOG BOOKS, EXCEPT WHERE NOTE 2 APPLIES.

DO NOT AFFECT AIRWORTHINESS. HOWEVER, THE ACCELERATEDWEAR INVOLVED MAY NOT BE COVERED BY WARRANTY.


AREA A:

AREA B:

AREA C:

AREA D:

1. ALLOWABLE TIME−LIMITED TORQUE.2. NO UNSCHEDULED MAINTENANCE ACTION REQUIRED.



D


2. CARRY OUT MAINTENANCE ACTIONS SPECIFIED IN CHAPTER 5−50−00.

20 60 120 180 240 300TIME (SEC.)

(SEE NOTE 2)

NOTE 2: OPERATION UP TO 117.0% TORQUE IS TIME UNLIMITED WHENNP IS BELOW 90%

122.0

100.0

TORQUE %


172.0

D

600

B

C

137.0

A B

3. AREA IS NOMINALLY LIMITED TO 5 MINUTES DURATION BUT MAYABE USED UP TO 10 MINUTES FOR ONE ENGINE INOPERATIVE OPERATION.

1. INVESTIGATE AND CORRECT CAUSE OF OVERTORQUE.REMOVE REDUCTION GEARBOX (RGB) MODULE AND INSPECT/REPAIRIN ACCORDANCE WITH OVERHAUL MANUAL INSTRUCTIONS

2..

NOTE 5: THE TORQUE LIMITS APPLICABLE TO THE PW127E APPLIES WHEN OPERATING AS A DERATED PW127F.

C23241B

PW127E (BS850/BS1034) Engine Overtorque LimitsFigure 3





(1) NO ACTION REQUIRED IF CONDITION OCCURS DURING START(SEE NOTE 1).

(2) IF CONDITION DID NOT OCCUR DURING START, DETERMINE

(1) NO ACTION REQUIRED IF CONDITION OCCURS DURINGTRANSIENT (SEE NOTE 2).

(2) IF CONDITION OCCURS DURING STEADY STATE, DETERMINE AND CORRECT CAUSE OF OVERTEMPERATURE. RECORDIN ENGINE LOG BOOK.

AREA

AREA

A

B

NOTE 1: TROUBLE SHOOTING IS RECOMMENDED

(REF. ENGINE FAULT ISOLATION)

WHEN TEMPERATURE IS CONSISTENTLY

IN AREA A.

NOTE 2: TRANSIENT IS DEFINED AS CHANGE

IN TEMPERATURE CAUSED BY

MOVEMENT OF THE POWER OR

CONDITION LEVER OR AN

ALTITUDE CHANGE.

REPLACE TURBOMACHINERY

NO ACTION REQUIRED

TIME SECONDS

0 5 10 15 20

750

800

840

850

900

950

1000

OB

SE

RV

ED

INTE

RTU

RB

INE

TEM

PE

RA

TUR

E T

6 (

C)

o

AND CORRECT CAUSE OF OVERTEMPERATURE. RECORD INENGINE LOG BOOK.

C32698A

PW124B (BS724/BS726/BS896), PW127 (BS774), PW127E (BS850/BS1034), PW127F(BS918/BS1033) and PW127M (BS1237) Engine Overtemperature Limits (Starting and Transient)

Figure 4





20

101

110

115

102.5

Np O

VERS

PEED

DURATION (SEC.)

SHUT ENGINE DOWN

REMOVE ENGINE

B C

D

AREA D: OVERSPEED FOR 20 SECONDS MAXIMUM.MAINTENANCE ACTION REQUIRED (REF. 05−50−00). ENGINE MUST BE REMOVEDAND INSPECTED IN ACCORDANCE WITH OVERHAUL MANUAL INSTRUCTIONSFOR LIGHT OVERHAUL.

AREA A:

AREA B:

ALLOWABLE OVERSPEED. NO MAINTENANCE ACTION REQUIRED. OVERSPEED DUE TO PROPELLER MALFUNCTION. PERMISSIBLE TO COMPLETEFLIGHT. POWER MUST BE SENT NOT TO EXCEED TAKEOFF OR NORMAL TAKEOFFOR MAXIMUM CONTINUOUS OR MAXIMUM CLIMB OR MAXIMUM CRUISE RATING ASAPPLICABLE. NO MAINTENANCE ACTION REQUIRED.

AREA C: OVERSPEED DUE TO PROPELLER MALFUNCTION. PERMISSIBLE TO COMPLETEFLIGHT. POWER MUST BE SENT NOT TO EXCEED TAKEOFF OR NORMAL TAKEOFFOR MAXIMUM CONTINUOUS OR MAXIMUM CLIMB OR MAXIMUM CRUISE RATING ASAPPLICABLE. MAINTENANCE ACTION REQUIRED (REF. 05−50−00).ENGINE MUST BE REMOVED AND INSPECTED IN ACCORDANCE WITH OVERHAULMANUAL INSTRUCTIONS.

A

C133880

PW124B (BS724/BS726/BS896). Engine Overspeed LimitsFigure 5





DURATION (SEC.)

0 20

AREA A:

AREA B:

ALLOWABLE OVERSPEED. NO MAINTENANCE ACTION REQUIRED.

OVERSPEED DUE TO PROPELLER MALFUNCTION. PERMISSIBLE TO COMPLETEFLIGHT. POWER MUST BE SENT NOT TO EXCEED TAKEOFF OR NORMAL TAKEOFFOR MAXIMUM CONTINUOUS OR MAXIMUM CLIMB OR MAXIMUM CRUISE RATING ASAPPLICABLE. NO ENGINE MAINTENANCE ACTION REQUIRED.

120

101

Np O

VERS

PEED

SHUT ENGINE DOWN

REMOVE ENGINEA

108

106

AREA C: OVERSPEED FOR 20 SECONDS MAXIMUM. MAXIMUM ITT OF 781 C (1438 F)MAINTENANCE ACTION REQUIRED (REF. 05−50−00). ENGINE MUST BE REMOVEDAND INSPECTED IN ACCORDANCE WITH OVERHAUL MANUAL INSTRUCTIONSFOR LIGHT OVERHAUL.

° °

5

C

B

C133881

PW127 (BS774), PW127E (BS850/BS1034) Engine Overspeed LimitsFigure 6





DURATION (SEC.)

0 20

AREA A:

AREA B:

ALLOWABLE OVERSPEED. NO MAINTENANCE ACTION REQUIRED.

OVERSPEED DUE TO PROPELLER MALFUNCTION. PERMISSIBLE TO COMPLETEFLIGHT. POWER MUST BE SENT NOT TO EXCEED TAKEOFF OR NORMAL TAKEOFFOR MAXIMUM CONTINUOUS OR MAXIMUM CLIMB OR MAXIMUM CRUISE RATING ASAPPLICABLE. NO ENGINE MAINTENANCE ACTION REQUIRED.

120

101

Np O

VERS

PEED

SHUT ENGINE DOWN

REMOVE ENGINEA

108

106

AREA C: OVERSPEED FOR 20 SECONDS MAXIMUM. MAXIMUM ITT OF 769 C (1416 F)MAINTENANCE ACTION REQUIRED (REF. 05−50−00). ENGINE MUST BE REMOVEDAND INSPECTED IN ACCORDANCE WITH OVERHAUL MANUAL INSTRUCTIONSFOR LIGHT OVERHAUL.

° °

5

C

B

C133882

PW127F (BS918/BS1033) and PW127M (BS1237) Engine Overspeed LimitsFigure 7





720

−50

OAT ( C)

OB

SE

RV

ED

INTE

RTU

RB

INE

TE

MP

ER

ATU

RE

T6

( C

)

−30 −10 10 30

740

760

780

°

°

(SEE NOTE)

NOTE: IF LIMIT IS EXCEEDED DURING NORMAL TAKE−OFF (0.9 RTO),REFER TO CHAPTER 05−50−00, UNSCHEDULED INSPECTIONS,OVERTEMPERATURE, FOR THE CORRECT MAINTENANCEACTIONS. RECORD IN ENGINE LOGBOOK.

C32962A

Normal Takeoff - ITT/T6 vs OAT (PW127 (BS774), PW127E (BS850/BS1034), PW127F(BS918/BS1033) and PW127M (BS1237))

Figure 8





05-10

Documents

engine operating limits

general operating limits

engine leading particulars

pw127 bs774 engine

pw127e bs850bs1034 engine

engine oil temperature

title page

pw127m bs1237 engines