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 73-21-01
 ALL  ú ú N02 Page 404 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 864-062-N00
 (7)  
For the applicable engine, open these circuit breakers and install the DO-NOT-CLOSE tags:

 (a)  
P6 Main Power Distribution Panel
 1) 6G01, FUEL SHUTOFF VALVE ENG 1
 2) 6G15, SCU ALT PWR ENG 1
 3) 6G23, ENG SCU 1
 4) 6L10, FUEL CONT VALVE ENG 1
 5) 6G02, FUEL SHUTOFF VALVE ENG 2
 6) 6G16, SCU ALT PWR ENG 2
 7) 6G24, ENG SCU 2
 8) 6L11, FUEL CONT VALVE ENG 2
 9) 6G03, FUEL SHUTOFF VALVE ENG 3
 10) 6G17, SCU ALT PWR ENG 3
 11) 6G25, ENG SCU 3
 12) 6L12, FUEL CONT VALVE ENG 3
 13) 6G04, FUEL SHUTOFF VALVE ENG 4
 14) 6G18, SCU ALT PWR ENG 4
 15) 6G26, ENG SCU 4
 16) 6L13, FUEL CONT VALVE ENG 4

 S 864-066-N00
 (8)  
Remove the electrical power if it is not necessary (AMM 24-22-00/201).

 S 014-054-N00

 (9)  
Open the fan cowl panels (AMM 71-11-04/201).

 S 044-056-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.
 (10)
 Do this procedure:  Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).

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

 S 014-055-N00
 S 014-057-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (12) Open the thrust reversers (AMM 78-31-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 73-21-01
 ALL  ú ú N03 Page 405 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
F.  Procedure
 S 684-009-N00
 (1)  
Drain the fuel from the fuel pump:

 (a)  
Put the container below the fuel pump.

 (b)  
Remove the drain plug (18) from the FP3 port of the fuel pump.

 (c)  
Let the fuel drain into the container.

 (d)  
Discard the packing (17).

 (e)  
Lubricate a new packing (17) with the petrolatum.

 (f)  
Install the new packing (17) on the plug (18).

 (g)  
Lubricate the threads of the drain plug (18) with engine oil.

 (h)  
Install the drain plug (18) in the FP3 port on the fuel pump.

 (i)  
Tighten the plug (18) to 45-55 pound-inches (5.1-6.2 newton-meters).

 (j)  
Install the lockwire on the plug (18).

 S 024-076-N00
 (2)  
Remove the FMU:

 (a)
Disconnect the electrical connectors (6, 6A, and 31):

 1)  Disconnect the electrical connectors (6 and 6A) W4P2 and W5P1 from the FMU M3108 (5). a) Install the caps on the open ends of the electrical
 connectors (6 and 6A).
 2)  Disconnect the electrical connector DM3108 (31) from the FMU (5). a) Install the cap on the open end of the electrical
 connector (31).
 (b)  Disconnect the supply tube (2) for the fuel distribution valve: 1) Remove the bolt (4) which attaches the clamps (3) for the EEC wire harness to the support bracket.
 2)  Remove the bolt (11) and the nut (12) which attach the clamp (9) to the clamp (10).
 NOTE: The clamp (10) is on the oil return tube for the
____ air/oil heat exchanger of the IDG.
 3) Remove the bolt (4A) which installs the clamp (3A) to the HPC case bracket. 4) Remove the bolt (11A) and the nut (12A) which install the clamp (9A) to the HPC bracket. 5) Disconnect the tube nuts (1) from the adapter for the fuel
 flow transmitter and the adapter (27) for FMU. 6) Move the tube (2) away from the FMU (5). 7) Discard the retainers (7) and packings (8). 8) Install the caps on the open ends of the tube (2), the
　
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