747-400 AMM 飞机维护手册 机载辅助动力 2(98)

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 49-52-08
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
L77724
A
747-400 MAINTENANCE MANUAL
 (e) Make sure you install all necessary protection covers.
 TASK 49-52-08-404-009
 3. P3 Air Filter Element Installation (Fig. 401)
__________________________________
 A. Consumable Materials
 (1)  D00418 Oil - Aircraft Turbine Engine
 B. Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 3 | Packing | 49.52.08 | 01 | 130 | | | 4 | Air Filter Element | | | 125 | | | 5 | Packing | | | 120 | 2.......….......…...................................…...........…......….......1
 C. Access
 (1)  
Location Zones
 221 Control Cabin - Left
 222 Control Cabin - Right
 310 Fuselage - Station 2360 to Station 2792

 (2)  
Access Panels
 317AL APU Access Door - Left
 318AR APU Access Door - Right

 D.
Procedure

 S 424-022
 CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY.
_______ IF YOU DO NOT REMOVE THE PROTECTION COVERS, DAMAGE TO THE APU CAN OCCUR.
 (1)  
Do these steps to install the P3 air filter element (4):

 (a)  
Lubricate the two new packings (3), (5) with a light coat of oil.

 (b)  
Install the packing (3) on the air filter element (4).

 (c)  
Install the air filter element (4) on the air filter housing.

 (d)  
Install the packing (5) on the air filter cover (6).

 (e)  
Install the air filter cover (6) on the air filter housing.

 (f)  
Make sure the three washers (1) touch the three nuts (2).

 (g)  
Turn the air filter cover (6) clockwise until the three flanges fully engage the three studs.

 (h)  
Tighten the three nuts (2) to 32-36 inch-pounds (3.6-4.1 newton-meters).

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 ALL  ú ú 01 Page 404 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 E. Put the Airplane Back to Its Usual Condition
 S 864-017
 (1)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (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 864-018
 (2)  
Remove the DO-NOT-OPERATE tag from the APU control switch on the P5 overhead panel.

 S 414-021

 (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.

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