S 415-038-N00
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 71-50-00
 ALL  ú ú N01 Page 508 ú Jun 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
ENGINE WIRE HARNESS - INSPECTION/CHECK
______________________________________
 1.  General
_______
 A.  This procedure gives the visual checks for all electrical harnesses on the power plant but not the harnesses with the externally braided cables.
 B.  If the engine wire harness is damaged, repair the wire harness with AMM 71-50-00/801, Wire Harness Repair.
 TASK 71-50-00-206-001-N00
 2.  Do the Check of the Engine Wire Harness
_______________________________________
 A.  References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 71-11-04/201, Fan Cowl Panels

 (3)  
AMM 71-11-06/201, Core Cowl Panels

 (4)  
AMM 78-31-00/201, Thrust Reverser System

 B.  
Access

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

 (2)  
Access Panel 416 and 417 Thrust Reverser Halves - Engine 1 426 and 427 Thrust Reverser Halves - Engine 2 436 and 437 Thrust Reverser Halves - Engine 3 446 and 447 Thrust Reverser Halves - Engine 4

 C.  
Procedure

 S 016-007-N00
 (1)  Open the fan cowl panels (AMM 71-11-04/201).
 S 046-013-N00
 WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)  Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).
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 71-50-00
 ALL  ú ú N01 Page 601 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 016-008-N00
 (3)  Open the core cowl panels (AMM 71-11-06/201).
 S 016-014-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00 WHEN YOU OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (4)  
Open the thrust reversers (AMM 78-31-00/201).

 S 866-003-N00

 (5)  
Make sure that the electrical power is disconnected (AMM 24-22-00/201).

 S 866-004-N00

 (6)  
Make sure the engine was not operated for five minutes.

 S 216-005-N00

 (7)  
Do the visual check of the wire harness.

 (a)  
Do these steps to examine the wire harness cables and wires:
 1) Examine all the cables in the wire harness for damage to
 the outer jacket and the braid.

 2)  Examine all the wires you can see in the wire harness for damage.

 (b)  
Do these steps to examine the wire harness connectors:
 1) Examine the position of the connector coupling nut.
 2) If the coupling nut is not fully on the connector

 receptacle, do these steps to examine the wire harness
 contacts (pins or sockets):
 a) Disconnect the wire harness connectors.
 b) Make sure the contacts are straight, not damaged, and

 correctly installed against the connector face. c) Connect the wire harness connectors.
 S 416-009-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00 WHEN YOU CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (8)  
Close the thrust reversers (AMM 78-31-00/201).

 (9)  
Close the core cowl panels (AMM 71-11-06/201).

 (10)
 Close the fan cowl panels (AMM 71-11-04/201).

 S 416-010-N00
 S 416-011-N00
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