(1)  
AMM 70-24-05/201, Electrical Harnesses

 (2)  
AMM 71-00-00/501, Power Plant

 (3)  
AMM 71-11-04/201, Fan Cowl Panels

 (4)  
AMM 71-11-06/201, Core Cowl Panels

 (5)  
AMM 78-31-00/201, Thrust Reverser System

 (6)  
IPC 73-11-02 Fig. 5

 (7)  
IPC 73-34-01 Fig. 5

 (8)  
WDM 73-34-12

 (9)  
SSM 73-34-02

 C.
Access

 (1)  
Location Zone 412 Engine 1 - Main Gearbox Fwd Face 5 o'clock 422 Engine 2 - Main Gearbox Fwd Face 5 o'clock 432 Engine 3 - Main Gearbox Fwd Face 5 o'clock 442 Engine 4 - Main Gearbox Fwd Face 5 o'clock

 (2)  
Access Panel
 416 Right Thrust Reverser Half - Engine 1
 426 Right Thrust Reverser Half - Engine 2
 436 Right Thrust Reverser Half - Engine 3
 446 Right Thrust Reverser Half - Engine 4

 D.
Procedure

 S 434-015-N00
 (1)  
Remove the protection caps from the differential pressure switch and the fuel pump.

 S 644-030-N00

 (2)  
Lubricate the new packings for the fuel pump ports with the petrolatum.

 (3)
Install the new packings in the recesses of the fuel pump ports.

 S 434-016-N00
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 73-34-01
 ALL  ú ú N02 Page 405 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 424-031-N00
 (4)  
Install the differential pressure switch with the steps that follow:

 (a)  
Lubricate the threads of the bolts, which attach the differential pressure switch, with engine oil.

 (b)  
Install the differential pressure switch with the bracket on the fuel pump with the bolts and two washers.

 NOTE: Install the washers below the bolt heads that do not
____ attach the bracket to the fuel pump.
 (c)  Tighten the bolts to 85-95 pound-inches (9.6-10.7 newton-meters).
 S 434-018-N00
 (5)
Remove the protection caps from the electrical connector DS1585.

 S 434-032-N00

 (6)  
Connect the electrical connector to the differential pressure switch (AMM 70-24-05/201).

 E.
Put the Airplane Back to Its Usual Condition.

 S 414-038-N00
 WARNING: OBEY THE INSTRUCTION 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.
 (1)  
Close the right thrust reverser (AMM 78-31-00/201).

 S 414-033-N00

 (2)  
Close the right core cowl panel (AMM 71-11-06/201).

 S 414-034-N00

 (3)  
Close the right fan cowl panel (AMM 71-11-04/201).

 S 444-035-N00

 (4)  
Do the activation procedure for the thrust reverser
 (AMM 78-31-00/201).

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 73-34-01
 ALL  ú ú N02 Page 406 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(5)  S 864-020-N00For the applicable engine, remove the DO-NOT-CLOSE tag and close this circuit breaker as follows: (a) P6 Main Power Distribution Panel 1) 6G1 FUEL SHUTOFF VALVE ENG 1 2) 6G2 FUEL SHUTOFF VALVE ENG 2 3) 6G3 FUEL SHUTOFF VALVE ENG 3 4) 6G4 FUEL SHUTOFF VALVE ENG 4
 (6)  S 864-021-N00Remove the DO-NOT-CLOSE tags and close these circuit breakers as follows: (a) P7 Overhead Circuit Breaker Panel 1) 7F9 EIU L 2) 7F10 EIU C 3) 7F15 EIU R
 (7)  S 864-022-N00Remove the DO-NOT-OPERATE tag from the FUEL CONTROL switch.
 (8)  S 794-023-N00Do the test of the fuel pump filter differential pressure switch that is shown in the Power Plant Test Reference Table (AMM 71-00-00/501).

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