(6)  
For the applicable engine, remove the DO-NOT-CLOSE tag and close
 these circuit breakers on the P414 panel:

 (a)  
6G15 SCU ALT PWR ENG 1

 (b)  
6G23 ENG SCU 1

 (c)  
6G16 SCU ALT PWR ENG 2

 (d)  
6G24 ENG SCU 2

 S 414-057-N00
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(e) (f) (g) (h)  6G17 SCU ALT PWR ENG 36G25 ENG SCU 36G18 SCU ALT PWR ENG 46G26 ENG SCU 4
 (7)  S 614-026-N00Do the servicing procedure for the oil tank (AMM 12-13-03/301).
 (8)  S 794-027-N00Do the Test No. 3 - Ground Test - Idle Power or the Test No. 13 -Main Oil Pressure Test (AMM 71-00-00/501).

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LUBRICATION AND SCAVENGE OIL PUMP - INSPECTION/CHECK
____________________________________________________
 1.  General_______
 A.  This procedure visually examines the lubrication and scavenge oil pump for signs of oil leakage, cracks, and corrosion.
 B.  You can get access to the lubrication and scavenge pump through the thrust reverser halves.
 TASK 79-21-04-206-001-N00
 2.  Visually Examine the Lubrication and Scavenge Oil Pump (Fig. 601)______________________________________________________
 A.  References
 (1)  
71-00-02/401, Power Plant

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

 (3)  
79-21-04/401, Lubrication and Scavenge Oil Pump

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

 (5)  
IPC 79-21-04 Fig. 1

 (6)  
IPC 79-21-05 Fig. 5

 B.  
Access

 (1)  
Location Zone 412 Engine 1 - Main Gearbox Aft Face 6 o'clock 422 Engine 2 - Main Gearbox Aft Face 6 o'clock 432 Engine 3 - Main Gearbox Aft Face 6 o'clock 442 Engine 4 - Main Gearbox Aft Face 6 o'clock

 (2)  
Access Panel 415 and 416 Thrust Reverser Halves - Engine 1 425 and 426 Thrust Reverser Halves - Engine 2 435 and 436 Thrust Reverser Halves - Engine 3 445 and 446 Thrust Reverser Halves - Engine 4

 C.  
Procedure

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

 S 216-003-N00

 (2)  
Visually examine the lubrication and scavenge oil pump for signs of oil leakage.

 NOTE:____The cracks are possibly the cause of an oil leak. Always examine the condition of the packings first, before you replace a component.
 (a)  If you find oil leakage from a magnetic chip detector probe or housing, remove the applicable magnetic chip detector assembly (Ref 79-21-10/401) to examine the packings for damage.
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
OIL TANK (REF)
SEE A LUBRICATION ANDMAINFWD SCAVENGE OILGEARBOX
MAGNETIC CHIP NO. 3 BEARING  (REF)  PUMP 
DETECTOR  ANGLE GEARBOX  SEE  B 
MAGNETIC CHIP NO. 4 BEARING  DETECTOR MAGNETIC CHIP  (BOTTOM VIEW) 
DETECTOR  A 

NO. 1,1.5, AND 2 BEARING MAGNETIC CHIP DETECTOR
MAIN GEARBOX (REF)
FWD
LUBRICATION ANDINTEGRATED DRIVE SCAVENGE OIL PUMPGENERATOR (REF)
B
Lubrication and Scavenge Oil Pump Inspection Figure 601
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