Start the Engine after Emergency Shutdown [PW11]

TASK 71-00-00-860-821-A
Start the Engine after Emergency Shutdown

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

ZONE: 210

1. Reason for the Job
Use this procedure to start the engine after an emergency shutdown.
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

B. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-817-A	Motor the Engine (Dry Method)
TASK 71-00-00-860-823-A	Start the Engine (Normal Automatic Start)
TASK 71-00-00-860-824-A	Discontinue Engine Start
TASK 72-00-00-000-805-A	Removal of the High (N2) Rotor-Turning Equipment
TASK 72-00-00-400-805-A	Installation of the High (N2) Rotor Turning Equipment
Start the Engine after Emergency Shutdown

3. Job Set-up
Subtask 71-00-00-869-347-A ** ON A/C NOT FOR ALL

A. Not Applicable

4. Procedure
Subtask 71-00-00-860-186-A ** ON A/C NOT FOR ALL

A. Start the Engine after Emergency Shutdown
(1) Find and correct the cause of the emergency shutdown.

NOTE: A hot shutdown is considered to be shutting down the engine that was operated above 70% N1 for more than one minute in preceding 20 minutes of operation.

(2) If the engine shutdown was a hot shutdown, do the steps that follow:
(a) In less than five minutes of the emergency shutdown (or when N2 is less than 20%), dry motor the engine as follows (Ref. AMM TASK 71-00-00-860-817):
1 Dry motor the engine four times for three minutes each.
2 If the emergency shutdown was a hot shutdown, do not attempt to restart the engine for eight hours after the hot shutdown occurred.
(3) If the engine operated in the limits and there was no damage to the engine, do the steps that follow:

Start the Engine after Emergency Shutdown ** ON A/C NOT FOR ALL

(a) In less than five minutes of the emergency shutdown, dry motor the engine as follows:
1 Set the ENG MASTER switch (ENG 1) or (ENG 2) to OFF on the center pedestal.
2 Make sure that the throttle control levers are set to IDLE.
3 Set the ENG/MODE selector switch to CRANK.
(b) Set the ENG MAN START pushbutton switch (1) or (2) to ON.
(c) Dry motor the engine until the Exhaust Gas Temperature (EGT) is less than 356 deg.F (180 deg.C) or for four minutes, whichever comes first.
(d) After all dry motor time, discontinue engine operation as follows:
1 Set the ENG MAN START pushbutton switch (1) or (2) to OFF.
2 The starter valve will close and stop the air supply to the starter.
3 The N1 and N2 rotor speeds will decrease to zero (0 RPM).
(4) Start the engine in less than two minutes of the last dry motor cycle (Ref. AMM TASK 71-00-00-860-824).
(5) After the engine starts, operate the engine at MIN IDLE for five minutes.
(6) After five minutes, you can operate the engine above MIN IDLE.
(7) If the engine cannot be dry motored (in less than five minutes after the emergency shutdown), do not try to start the engine again for a minimum of 90 minutes and do the steps that follow:

NOTE: Turn the fan clockwise as seen from the rear (normal operation). If the fan is accidentally turned counterclockwise, there can be some resistance. This condition is permitted, but do not continue to turn the fan in the counterclockwise (incorrect) direction.

(a) Make sure that the (N1) rotor turns freely as follows:
1 Turn the fan blades for three revolutions by hand in the clockwise direction as viewed from the rear.
2 The N1 rotor must turn freely for 360 degrees.
(8) Make sure that the (N2) rotor turns freely as follows:

CAUTION: BEFORE YOU REMOVE THE N2 CRANK-PAD COVER, PUT A CONTAINER IN POSITION BELOW IT TO COLLECT THE UNWANTED OIL. THE MAIN GEARBOX OIL-LEVEL CAN BE HIGHER THAN THE N2 CRANK-PAD COVER IF THE ENGINE DID NOT OPERATE DURING EIGHT HOURS. IF YOU DO NOT OBEY THIS INSTRUCTION, OIL CAN SPILL AND CAUSE DAMAGE TO THE ENGINE PARTS.

(a) Remove the gearbox crank pad cover (Ref. AMM TASK 72-00-00-000-805).
(b) Apply the required torque with a hand wrench installed on the gearbox crank pad to turn the N2 rotor.
(c) The N2 rotor must turn freely for 360 degrees.
(9) If either the N1 or N2 rotor (or both rotors) will not turn freely, wait 30 minutes and try again to turn the rotors again by hand.
(10) Continue to try to turn both rotors by hand every 30 minutes until both rotors turn freely.
(11) Install the gearbox crank pad cover (Ref. AMM TASK 72-00-00-400-805).
(12) After both rotors turn freely, dry motor the engine as follows (Ref. AMM TASK 71-00-00-860-817):
(a) On the center pedestal, set the ENG MASTER switch (ENG 1) or (ENG 2) to OFF.
(b) Make sure that the throttle control levers are set to IDLE.
(c) Set the ENG/MODE selector switch to CRANK.
(d) Set the ENG MAN START pushbutton switch (1) or (2) to ON.
(e) Dry motor the engine for two minutes with the starter, after two minutes discontinue the operation as follows:
1 Set the ENG MAN START pushbutton switch (1) or (2) to OFF.
a The starter valve will close and stop the air supply to the starter.
b The N1 and N2 rotor speeds will decrease to zero (0 RPM).
(f) Wait for five minutes at zero (0) N2 RPM.
(g) Dry motor the engine again for two minutes with the starter, after the two minutes discontinue the operation as follows:
1 Set the ENG MAN START pushbutton switch (1) or (2) to OFF.
a The starter valve will close and stop the air supply to the starter.
b The N1 and N2 rotor speeds will decrease to zero (0 RPM).
(13) Start the engine in less than two minutes of the last dry motor cycle (Ref. AMM TASK 71-00-00-860-823).
(14) After the engine starts, operate the engine at MIN IDLE for ten minutes.
(15) After ten minutes you can operate the engine above MIN IDLE.

[Rev.10 from 2021] 2026.04.01 12:57:05 UTC