D01189
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-21-00
ALL ú ú 03 Page 2 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
CONNECTOR SERVICE GROUND PACK 1 SEE C AIR CHECK VALVE CONDITIONED PACK 1 AIR CHECK VALVE CONDITIONED PACK 2
SEE D
CONDITIONED AIR CHECK VALVE PACK 3
PACK 2 CONNECTOR SERVICE GROUND WHEEL WELL WING GEAR (REF) BULKHEAD FORWARD
FWD B EQUIPMENT BAY AIR CONDITIONING SEE D PACK 3 CONNECTOR SERVICE GROUND SEE D VALVE AIR CHECK CONDITIONED 1
FROM WATER
VIBRATION
SEPARATOR
ISOLATOR/
DUCT
ASSEMBLY
CONNECTOR SERVICE GROUND AIR PLENUM TO CONDITIONED C
VALVE CHECK SWING D
1 AIRPLANES WITH THREE GROUND SERVICE CONNECTIONS
Conditioned Air Manifold
Figure 1 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-21-00
ALL ú ú 03 Page 3 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
H48899
A
747-400
MAINTENANCE MANUAL
(2) When a pack is shut down by closure of its flow control and shutoff valve, it ceases to supply the main distribution manifold. Check valves prevent reverse flow of air from the plenum into the pack.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-21-00
ALL ú ú 01 Page 4 ú Oct 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
CONDITIONED AIR CHECK VALVE - MAINTENANCE PRACTICES
___________________________________________________
1. General_______
A. There is one task in this procedure, an inspection of a conditioned air check valve.
B. There is a conditioned air check valve for each of the three air conditioning packs. The check valves are installed on the forward bulkhead of the wing gear wheel well.
C. This procedure is the same for all three check valves.
D. Access to the check valves is through the wing gear wheel well.
TASK 21-21-01-002-001
2. Conditioned Air Check Valve Inspection (Fig. 201)______________________________________
A. Consumable Materials
(1)
B00600 Alcohol - Isopropyl
(2)
G01043 Cloth - Lint Free
B. References
(1)
AMM 09-11-00/201, Towing
(2)
AMM 32-00-30/201, Landing Gear Door Locks
(3)
IPC 21-23-52 Fig. 2
(4)
IPC 21-23-63 Fig. 1
C. Access
(1) Location Zone
135 Wing Landing Gear Well, LH
136 Wing Landing Gear Well, RH
D. Procedure
S 862-002
(1)
Make sure that all three PACKS switches on the P5 overhead panel are set to OFF.
S 492-011
(2)
Make sure the landing gear ground locks are installed (AMM 09-11-00/201).
S 492-012
WARNING: REFER TO THE SPECIFIED PROCEDURE TO INSTALL THE DOOR LOCKS
_______ CORRECTLY. THE DOORS CAN CLOSE QUICKLY IF YOU INSTALL THE DOOR LOCKS INCORRECTLY. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO THE EQUIPMENT.
(3) Install the body and the wing gear door locks (AMM 32-00-30/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-21-01
ALL ú ú 01 Page 201 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
PACK 1 中國航空網 m.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：747-400 AMM 飛機維護手冊 空調 AIR CONDITIONING 1(18)
