71-00-30
 ALL  ú ú N01 Page 201 ú Oct 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(2)  
You can lock the N2 rotor when you remove the starter and install a gearbox lock in its place.

 (3)  
You can lock the actuator for the 2.5 bleed valve in the closed position with the retaining fixture. You then install the covers on the exhaust ducts for the 2.5 bleed valve. This stops the air flow through the bleed valves, which causes the rotors to turn against the N1 and N2 rotors (which are locked).

 F.  
You must send all the parts removed from the engine, which does not
 operate, with the engine.

 TASK 71-00-30-572-021-N00
 2.  Prepare to Ferry Engine - Engine Turns Freely
_____________________________________________
 A.  General
 (1)  
You can do the procedure where the engine turns if you do the specified tests and take the specified precautions. These tests and precautions make sure that when the engine turns freely no more damage will occur.

 B.  
Special Tools and Equipment

 (1)  
G57NB-5 Collars - Circuit Breaker, Nylon Molding Corp., Garwood, NJ (five necessary)

 C.  
Standard Tools and Equipment

 (1)  
Mats - Protective, Rubber Manufacturers
 Association, Grade SC43, neoprene
 sponge, 1 inch thick, approximately 3 X
 4 feet with warning streamers attached
 (three are necessary)

 D.  
References

 (1)  
AMM 12-13-03/301, Engine - Servicing

 (2)  
AMM 24-22-00/201, Manual Control

 (3)  
AMM 45-10-00/201, Central Maintenance Computer System

 (4)  
AMM 71-11-04/201, Fan Cowl Panels

 (5)  
AMM 71-11-06/201, Core Cowl Panels

 (6)  
AMM 72-00-00/201, Engine

 (7)  
AMM 78-31-00/201, Thrust Reverser System

 (8)  
AMM 79-21-05/401, Main Oil Filter Element

 (9)  
AMM 79-21-10/601, Magnetic Chip Detector

 E.  
Access

 (1)  
Location Zones
 412 Engine 1
 422 Engine 2
 432 Engine 3
 442 Engine 4

 (2)  
Access Panels
 415 and 416 Thrust Reverser Halves - Engine 1
 425 and 426 Thrust Reverser Halves - Engine 2
 435 and 436 Thrust Reverser Halves - Engine 3
 445 and 446 Thrust Reverser Halves - Engine 4

 F.  
Procedure

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 71-00-30
 ALL  ú ú N01 Page 202 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 492-030-N00

 WARNING:_______ MAKE SURE YOU OPEN THE APPLICABLE ENGINE IGNITION CIRCUIT
 BREAKERS BEFORE YOU OPEN THE ENGINE FUEL CONT VALVE CIRCUIT
 BREAKER.  THE IGNITER PLUGS CAN FIRE AUTOMATICALLY IF YOU DO
 NOT OPEN THE CIRCUIT BREAKERS.  IF THE COMBUSTION CHAMBER HAS
 FUEL IN IT, AN INTERNAL ENGINE FIRE OR TAILPIPE FIRE CAN OCCUR.
 THE FIRE CAN CAUSE INJURY TO PERSONS AND DAMAGE TO THE ENGINE.
 CAUTION:_______ DO NOT LET THE ENGINE TURN FREELY IF IT WILL CAUSE ENGINE
 DAMAGE.  USE THE LOCKED ROTOR PROCEDURE AS AN ALTERNATIVE.

 (1)  Open these circuit breakers for the applicable engine and install circuit breaker collars:
 (a)  P6 Main Power Distribution Panel 1) 6F1 IGN 1 ENG 1 2) 6K19 IGN 2 ENG 1 3) 6G19 STBY IGN ENG 1 4) 6F2 IGN 1 ENG 2 5) 6K20 IGN 2 ENG 2 6) 6G20 STBY IGN ENG 2 7) 6F3 IGN 1 ENG 3 8) 6K21 IGN 2 ENG 3 9) 6G21 STBY IGN ENG 3 10) 6F4 IGN 1 ENG 4 11) 6K22 IGN 2 ENG 4 12) 6G22 STBY IGN ENG 4
 S 862-026-N00
 (2)  
Supply electrical power (AMM 24-22-00/201).

 S 282-003-N00

 (3)  
Get access to the log book on the flight deck and do these steps:

 (a)  
Make sure the engine had no oil pressure problems during the last operation of the engine

 (b)  
Make sure there were no oil quantity problems during the last operation of the engine

 (c)  
Make sure there were no vibration problems during the last operation of the engine.
　
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