S 494-023
 (3)  
Do the "Installation of the Door Locks on the Body Landing Gear" task (AMM 32-00-30/201).

 S 034-004

 (4)
Remove the clamp that holds the drain line to the structure.

 S 034-005

 (5)  
Loosen the nut assembly that holds the flame arrestor to the adapter.

 S 034-006

 (6)  
Remove the mounting screws and washers (2 locations) that attach the valve housing to the valve base.

 S 024-007

 (7)  
Remove the housing, the spring, and the secondary poppet as a unit.

 S 034-008

 (8)  
Remove the spring and the secondary poppet from the valve housing.

 S 034-019

 (9)  
Discard the packing.

 TASK 28-25-08-404-009
 3. APU Fuel Line Shroud Drain Valve Secondary Poppet Installation (Fig. 401)
______________________________________________________________
 A. References
 (1)  
AMM 32-00-30/201, Landing Gear Door Locks

 (2)  
AIPC 28-25-04, Fig. 5

 B.
Access

 (1)  
Location Zone
 138 Body Landing Gear Well, Right

 C.
Procedure

 S 164-010
 (1)  
Clean the valve base and the mounting surfaces.

 (2)  
Install the secondary poppet on top of the valve base.

 (3)  
Install the spring on top of the secondary poppet.

 (4)  
Install a new packing in the base of the housing.

 S 434-011
 S 434-012
 S 424-013
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-25-08
 ALL  ú ú 01 Page 402 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

APU FUEL LINE SHROUD DRAIN VALVESEE A
DRAIN LINE CLAMP
FLAME ARRESTER NUT ASSEMBLY ADAPTER PACKING HOUSING
VALVE BASE MOUNTING SCREW (2 LOCATIONS)
WASHER (2 LOCATIONS)
PACKING
SPRING
SECONDARY
POPPET

A
APU Fuel Line Shroud Drain Valve Secondary Poppet Installation
Figure 401

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-25-08
 ALL  ú ú 01 Page 403 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (5)  S 424-020Carefully move the valve housing over the spring and the poppet.
 (6)  S 434-014Install the mounting screws and the washers (2 locations).
 (7)  S 434-021Install lockwire on the screws.
 (8)  S 714-015Do a check of the secondary poppet. (a) From below the fuselage, push on the poppet with the eraser end of a pencil (or equivalent). (b) Quickly move the pencil away from the poppet. (c) Make sure the poppet returns to its usual position.
 (9)  S 434-016Install the nut assembly that holds the flame arrestor to the adapter.
 S 434-022

 (10)
 Install the lockwire on the nut assembly. S 434-017

 (11)
 Install the clamp that holds the drain line to the structure.

 S 094-018
 WARNING:_______REFER TO AMM 32-00-30/201 FOR LOCK REMOVAL PROCEDURE. IF THE DOORS MOVE QUICKLY, INJURY TO PERSONS OR DAMAGE TO EQUIPMENT COULD OCCUR.
 (12) Remove the wing and the body gear door locks (AMM 32-00-30/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-25-08
 ALL  ú ú 01 Page 404 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 APU FUEL BOOST PUMP RECEIVER - REMOVAL/INSTALLATION
___________________________________________________
 1.  General_______
 A. This procedure has two tasks:
 (1)
A task to remove the receiver for the APU fuel boost pump.
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 燃油 FUEL 3(104)