15.
PACKING MAIN

18. TRANSFER GEARBOX
17. TRANSFER TUBE TUBE (REF)
19.  
PACKINGS

20.  
PACKINGS FWD

21.
WASHER

7. LUBRICATION (4 LOCATIONS)
AND SCAVENGE  B
OIL PUMP
22.  BOLT (4 LOCATIONS)
1
ENGINES WITHOUT PW SB 79-58 2
ENGINES WITH PW SB 79-58
Lubrication and Scavenge Oil Pump Figure 401 (Sheet 1)
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 79-21-04
 ALL  ú ú N02 Page 402 ú Jun 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
ENGINE OIL TANK
IDG
MAIN GEARBOX MAIN DRAIN PLUG GEARBOXFWD (REF)SEE D
C
FWD
MAIN GEARBOX DRAIN PLUG
D
Lubrication and Scavenge Oil Pump Figure 401 (Sheet 2)
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 ALL  ú ú N01 Page 403 ú Jun 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(c)  
6G16 SCU ALT PWR ENG 2

 (d)  
6G24 ENG SCU 2

 (e)  
6G17 SCU ALT PWR ENG 3

 (f)  
6G25 ENG SCU 3

 (g)  
6G18 SCU ALT PWR ENG 4

 (h)  
6G26 ENG SCU 4

 S 014-052-N00
 (2)  Open the fan cowl panels (AMM 71-11-04/201).
 S 044-054-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.
 (3)  
Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).

 S 014-053-N00

 (4)  
Open the core cowl panels (AMM 71-11-06/201).

 S 014-055-N00
 WARNING: OBEY THE INSTRUCTIONS IN 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.
 (5)  
Open the thrust reversers (AMM 78-31-00/201).

 S 684-034-N00

 (6)  
Put the containers below the master magnetic chip detector ports for the oil tank and the main gearbox, and the lubrication and scavenge oil pump.

 S 684-036-N00

 (7)  
Remove the magnetic chip detector probe and housing assembly from the main gearbox to fully drain the oil (AMM 79-21-10/401).

 S 684-035-N00

 (8)  
Remove the magnetic chip detector probe and housing assembly from the oil tank to fully drain the oil (AMM 79-21-10/401).

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 ALL  ú ú N03 Page 404 ú Oct 10/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 034-063-N00
 (9)  ENGINES WITHOUT PW SB 79-75; do the steps that follow:
 (a)  
Remove the bolts (12) which attach the bracket (13) and the flange of the supply tube (14) for the main oil filter to the aft top port on the lubrication and scavenge oil pump.

 (b)  
Loosen the bolts which attach the clamp (14) to make it easier to do the removal.

 S 034-064-N00
 (10) ENGINES WITH PW SB 79-75; Do the steps that follow (Fig. 402):
 (a)  
Remove bolts (2) which attach the tube (1) to top of the dampener (5) or adapter (15).

 (b)  
Remove bolt (14) which attaches the tube (1) to diffuser case bracket (13) at approximately the 7 o'clock position.

 (c)  
Remove bolts (7), nuts (8) and clamp (11) which attach the tube (1) to the bracket (12) on rear face of gearbox.

 (d)  
Remove bolts (7), nuts (8) and clamp (10) which attach the tube (1) to the bracket (9) at forward face of gearbox.
　
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