B. Consumable Materials
 (1)  
D00418 Oil - Aircraft Turbine Engine

 C.
References

 (1)  
49-11-00/201, Auxilliary Power Unit

 (2)  
49-31-04/401, Fuel Manifold and Nozzle Adapters.

 (3)  
49-41-04/401, APU Igniter Plug

 (4)  
WDM 49-11-11, 49-11-18

 (5)  
SSM 49-11-01

 D.
Access

 (1)  
Location Zone
 317 APU Compartment, LH
 318 APU Compartment, RH

 (2)  
Access Panel
 317AL APU Access Door
 318AR APU Access Door

 E.
Procedure

 S 866-001
 (1)  
Make sure the APU control switch on the P5 panel is OFF and attach a DO-NOT-OPERATE tag.

 S 866-002

 (2)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P6 Main Power Supply Panel
 1) 6K18 APU ALTN CONT

 (b)  
P83 Panel, E8 Aft Equipment Center
 1) APU PRIMARY CONT

 S 016-003
 (3)  
Open the APU access doors:

 (a)  
Open the latches on the APU access doors.

 (b)  
Open the APU access doors.

 (c)  
Engage the support rods for the APU access doors.

 S 296-004
 (4)  
Do the borescope inspection of the cooling fan (Fig. 602):

 (a)  
Remove the two nuts and the washers that attach the borescope inspection cover to the cooling fan housing.

 (b)  
Remove the cover with the PWC 41416 puller.
 1) Remove and discard the packing.

 CAUTION:_______DO NOT USE FORCE TO INSTALL THE GUIDE TUBE. THE GUIDE TUBE MUST EASILY INSTALL IN THE PORT. DAMAGE TO THE GUIDE TUBE CAN OCCUR.

 (c)  
Put the PWC 41495 guide tube in the inspection port. 1) Attach the tube flange to the boss.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

LOAD COMPRESSOR CRANK COVER
SEE A
HIGH ROTOR
CRANK COVER

SEE B
Load Compressor and High Rotor Crank Covers
Figure 601 (Sheet 1)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

ACCESSORY GENERATOR
GEARBOX NO. 1 PAD
GENERATOR
NO. 2 PAD

WASHER
BOLT PACKING
COVER
WASHER
A

NUT PACKING
COVER FWD
B
Load Compressor and High Rotor Cranking Cover Figure 601 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
COOLING FAN SEE A
A HOUSING COOLING FAN 
A  A COVER PACKING  NUT WASHER 
SEE  B 
COOLING FAN 
INSPECTION AREA  TUBE GUIDE 

A-A
Cooling Fan Borescope Inspection
Figure 602 (Sheet 1)

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A
747-400
MAINTENANCE MANUAL

B

CAUTION:_______ BE VERY CAREFUL WITH THE BORESCOPE DEVICE.  THIS DEVICE
　
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