(2)
71-00-00/501, Power Plant

 (3)
78-31-00/201, Thrust Reverser System

 E.
Access

 (1)  
Location Zone
 412 Engine 1 - HPC Case 8 o'clock
 422 Engine 2 - HPC Case 8 o'clock
 432 Engine 3 - HPC Case 8 o'clock
 442 Engine 4 - HPC Case 8 o'clock

 (2)  
Access Panel
 415 Left Thrust Reverser Half - Engine 1
 425 Left Thrust Reverser Half - Engine 2
 435 Left Thrust Reverser Half - Engine 3
 445 Left Thrust Reverser Half - Engine 4

 F.
Procedure

 S 644-024-N00
 (1)
Lubricate the packings (13) with engine oil.

 (2)
Install the packings (13) to the solenoid (3).

 S 424-013-N00

 (3)
Put the solenoid (3) on the aft end of the bypass valve.

 (a) Make sure the electrical connectors point down.

 (4)
Lubricate the threads of the bolts (12) with engine oil.

 S 434-012-N00
 S 644-025-N00
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 79-21-03
 ALL  ú ú N01 Page 405 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(5)  S 434-014-N00Install the bolts (12) and washers (11). (a) Tighten the bolts (12) to 60-80 pound-inches (6.8-9.0 N.m.). (b) Install the lockwire or safety cable and safety cable ferrule to the bolts (12).
 (6)  S 434-026-N00Remove the protection caps from the electrical connectors (1, 2).
 S 434-035-N00

 CAUTION: USE THE CORRECT ASSEMBLY PROCEDURE, AND TOOLS, FOR THE HARNESS
_______ CONNECTOR INSTALLATION (REF 70-24-05/201). IF YOU USE THE INCORRECT ASSEMBLY PROCEDURE, OR TOOLS, A DAMAGED OR LOOSE CONNECTOR CAN OCCUR. A LOOSE CONNECTOR PERMITS VIBRATION, WHICH CAUSES THE CONTACTS TO WEAR AND DECREASES THE LIGHTNING PROTECTION.
 (7)  
Connect the electrical connectors (1, 2) to the forward and rearward electrical connectors on the solenoid (3) (Ref 70-24-05/201).

 S 644-027-N00

 (8)  
Lubricate the packing (7) with engine oil.

 S 434-016-N00

 (9)  
Install the packing (7) to the oil return tube (5) for the bypass valve.

 S 644-028-N00

 (10)
 Lubricate the packing (9) with engine oil.

 S 434-029-N00

 (11)
 Install the packing (9) and retainer (8) to the other end of the oil return tube (5).

 S 434-017-N00

 (12)
 Put the oil return tube (5) to the bypass valve.

 (a)  
Tighten the tube nut (6) with your hand.

 S 434-030-N00
 (13)
 Put the other end of the oil return tube (5) to the main oil filter.

 S 644-031-N00

 (14)
 Lubricate the threads of the bolts (10) with engine oil.

 (15)
 Install the bolts (10) to attach the oil return tube (5).

 (16)
 Tighten the bolts (10) to 36-40 pound-inches (4.1-4.5 N.m).

 S 434-032-N00
 S 434-018-N00
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 79-21-03
 ALL  ú ú N01 Page 406 ú Jun 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 434-019-N00
 (17)
 Tighten the tube nut (6) to 65-70 pound-inches (7.3-7.9 N.m).

 S 034-033-N00

 (18)
 Loosen the tube nut (6).

 S 434-034-N00

 (19)
 Tighten the tube nut (6) again to 65-70 pound-inches (7.3-7.9 N.m.).

 (a)  Install the lockwire or safety cable and safety cable ferrule to the tube nut (6).

 G.
Put the Airplane Back to Its Usual Condition

 S 414-020-N00
 (1)  
Close the left thrust reverser half (Ref 78-31-00/201).

 S 864-021-N00

 (2)  
For the applicable engine, remove the DO-NOT-CLOSE tag and close this circuit breaker on the P6 panel:
　
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