G.
Put the Airplane Back to Its Usual Condition

 S 864-036-N00
 (1)  Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P7 panel:
 (a)  
7F9 EIU L

 (b)  
7F10 EIU C

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(c)  7F15 EIU R
 (2)  S 614-037-N00Do the servicing procedure for the engine oil system (AMM 12-13-03/301).
 (3)  S 794-038-N00Do the test of the engine oil tank that is shown in the Power Plant Test Reference Table (AMM 71-00-00/501).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
OIL TANK - INSPECTION/CHECK
___________________________
 1.  General
_______
 A.  This procedure contains a task to visually examine the engine oil tank for signs of oil leakage and cracks.
 B.  Open the left thrust reverser half to get access to the oil tank.
 TASK 79-11-01-216-001-N00
 2.  Engine Oil Tank Inspection (Fig. 601)
__________________________
 A.  References
 (1)  
71-00-02/401, Power Plant

 (2)  
78-31-00/201, Thrust Reverser System

 (3)  
79-11-01/401, Oil Tank

 (4)  
79-21-10/401, Magnetic Chip Detector

 (5)  
IPC 71-71-00 Fig. 1

 (6)  
IPC 72-61-00 Fig. 25

 (7)  
IPC 79-11-01 Fig. 10

 (8)  
IPC 79-11-01 Fig. 11

 (9)  
IPC 79-11-03 Fig. 1

 B.  
Access

 (1)  
Location Zone 412 Engine 1 - Main Gearbox Aft Face 9 o'clock 422 Engine 2 - Main Gearbox Aft Face 9 o'clock 432 Engine 3 - Main Gearbox Aft Face 9 o'clock 442 Engine 4 - Main Gearbox Aft Face 9 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

 C.  
Procedure

 S 016-002-N00
 (1)  
Open the left thrust reverser half (Ref 78-31-00/201).

 S 216-003-N00

 (2)
Visually examine the oil tank for signs of oil leakage or cracks:

 NOTE: Cracks that you can see are possibly the cause of an oil
____ leak. Always examine the condition of the packings before you replace the components.
 (a)  If you find oil leakage around the magnetic chip detector probe or the housing, remove the magnetic chip detector assembly (Ref 79-21-10/401). 1) Examine the packings for damage.
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE  A  2 
TRANSMITTER OIL QUANTITY 
OIL LEVEL GAGE OIL TANK CAP 

1 
GEARBOX MAIN  OIL TANK 
FWD  DETECTOR CHIP MAGNETIC MASTER 
1 2  ENGINES WITHOUT PWSB 79-65 ENGINES WITH PWSB 79-65 Figure 601 Oil Tank Inspection A 

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