(b)
Pressurize the Pneumatic System with APU.
(c)
Pressurize the Pneumatic System with one or more engines.
(11)
Make sure the flow is normal at the lavatory faucet.
S 714-023
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. FREIGHTERS ú
38-15-65
ú ú 01 Page 405 ú Feb 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 794-024
(12)
Make sure there are no air leaks at the connections that were installed in the steps above.
S 864-025
(13)
For the ceiling panels that were removed, do this task: "Forward Cargo Container Compartment Ceiling and Sidewall Linings -Installation" (AMM 25-52-01/401).
S 864-026
(14)
Do this task: "Water System Pressurization" (AMM 38-15-60/201).
S 864-027
(15)
If pneumatic power is not necessary, do this task: "Release the Pressure in the Pneumatic System (AMM 36-00-00/201).
S 864-028
(16)
Remove electrical power is it is not necessary (AMM 24-22-00/201).
TASK 38-15-65-004-029
4. Unloader Check Valve Removal (Fig. 401)____________________________
A. References
(1)
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Linings
(2)
AMM 38-15-60/201, Water System Pressurization
B. Access
(1) Location Zone 124 Forward Cargo Container Compartment Aft Half, Right
C. Procedure
S 864-030
WARNING: MAKE SURE YOU REMOVE THE AIR PRESSURE FROM THE WATER
_______ PRESSURIZATION SYSTEM BEFORE YOU START TO REMOVE THE UNLOADER CHECK VALVE. AIR WITH HIGH PRESSURE AND TEMPERATURE CAN CAUSE INJURY TO PERSONS.
(1)
Do this task: "Water System Depressurization" (AMM 38-15-60/201).
S 014-031
(2)
Do the "Containerized Cargo Compartment Ceiling and Sidewall Linings Removal" task (AMM 25-52-01/401) to remove the upper 12 inches of the RH vertical sidewall panels between stations 840 and 860.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. FREIGHTERS ú
38-15-65
ú ú 01 Page 406 ú Feb 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 014-032
(3)
Do the "Containerized Cargo Compartment Ceiling and Sidewall Linings Removal" task (AMM 25-52-01/401) to remove the ceiling panels adjacent to the sidewall panels that you removed.
S 014-050
(4)
Find the 1/2-inch diameter airline that connects to the compressor to the unloader check valve.
S 034-051
(5)
Remove the clamp that holds the 1/2-inch diameter air line to the floor beam at RBL 92.
S 034-033
(6)
Remove the clamshell clamp from the coupling on the inlet side of the unloader check valve.
S 034-034
(7)
Move the sleeve away from the unloader check valve.
S 034-035
(8)
Remove the adapter from the inlet side of the unloader check valve.
S 024-036
(9)
Remove the unloader check valve.
S 034-037
(10)
Remove and discard the O-rings.
TASK 38-15-65-404-038
5. Unloader Check Valve (Fig. 401)____________________
A. Consumable Materials
(1) D00463 Lubricant - White Protopet 1S (Witco Corp, New York, NY 07804)
B. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall linings.
(3)
AMM 38-15-60/201, Water System Pressurization
C. Access
(1) Location Zone 124 Forward Cargo Container Compartment Aft Half, Right
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. FREIGHTERS ú
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：747-400 AMM 飞机维护手册 气动系统 WATER/WASTE(36)
