(a)  
P6-2 Main Power Distribution Panel
 1) 6K18, APU ALTN CONT

 (b)  
P83 Aft APU Equipment Control and Circuit Breaker Panel 1) APU PRIME CONT

 S 866-028
 (2)  
Remove the DO-NOT-OPERATE tag from the APU control switch on the P5 overhead panel.

 S 416-026

 (3)  
Close the left APU access door, 317AL, and right APU access door, 318AR:

 (a)  
Remove the two quick-release pins, disconnect the two hold-open rods and put the two hold-open rods in the two clips on the right access door.

 (b)  
Install the two quick-release pins in the two brackets on the right APU compartment bulkhead.

 (c)  
Lift the right access door until you can install the lanyard on the pin at the aft APU compartment bulkhead.

 NOTE: The lanyard will hold the right access door on the APU
____
 compartment bulkhead.

 (d)  
Remove the two quick-release pins, disconnect the two hold-open rods and put the two hold-open rods in the two clips on the left access door.

 (e)  
Install the two quick-release pins in the two brackets on the left APU compartment bulkhead.

 (f)  
Make sure the insulation covers are correctly attach to the APU compartment firewall.

 (g)  
Lift the left access door until the two APU access doors are approximately aligned.

 (h)  
Close the two APU access doors.

 (i)  
Close the six latches on the right access door.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
 49-11-00
 ALL  ú ú 03 Page 603 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 AUXILIARY POWER UNIT - CLEANING AND PAINTING
____________________________________________
 1.  General_______
 A.  This procedure gives a task to clean the external surfaces of the APU engine and the APU compartment surfaces. It is not necessary to internally clean or compressor wash the APU.
 B.  You can get access to the APU compartment through the APU access doors.
 TASK 49-11-00-117-001
 2.  APU Engine and APU Compartment Cleaning_______________________________________
 A.  Standard Tools and Equipment
 (1)  
Clean Rags - Commercially available

 B.  
Consumable Materials

 (1)  
B00722 Solvent, Stoddard, P-D-680

 C.  
Access

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

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

 D.  
Procedure

 S 017-002
 (1)  
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 867-003
 (2)  
Make sure the APU control switch on the P5 panel is OFF and attach a DO-NOT-OPERATE tag.

 S 867-004

 (3)  
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

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
 49-11-00
 ALL  ú ú 01 Page 701 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 117-005
 WARNING:_______ USE THE SOLVENT IN AN AREA THAT HAS A GOOD FLOW OF AIR.  DO NOT
 LET THE SOLVENT TOUCH YOUR SKIN.  DO NOT BREATHE THE FUMES FROM
 THE SOLVENT.  DO NOT USE THE SOLVENT NEAR AN OPEN FLAME OR IN
 AN AREA WHERE THE TEMPERATURE IS HIGH.
 CAUTION:_______ MAKE SURE THE APU IS COOL BEFORE YOU CLEAN THE ENGINE.  A HOT
　
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