S 022-025
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A
747-400 MAINTENANCE MANUAL
S 422-026
(5) Reconnect the applicable electrical connector to the compressor discharge overheat switch:
-DS520 for pack 1
-DS517 for pack 2
-DS522 for pack 3
S 212-027
(6) Make sure that the SYS FAULT light goes off when you push the PACK RST switch.
F. Put the Airplane Back to its Usual Condition
S 412-028
(1) Close the applicable access door (AMM 06-09-03/201):
-191A-L for pack 1
-191H-L for pack 2
-192A-R for pack 3
S 862-029
(2)
Make sure the applicable (1, 2, or 3) PACKS selector, on the overhead panel, P5, is in the OFF position.
S 862-038
(3)
Remove the DO-NOT-CLOSE tag and close these circuit breakers, on the P6 Main Power Distribution Panel:
(a)
6F35, PACK TEMP CONT A
(b)
6F36, PACK TEMP CONT B
(4)
Remove the electrical power if it is not needed (AMM 24-22-00/201).
S 862-030
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747-400 MAINTENANCE MANUAL
WATER ASPIRATOR - REMOVAL/INSTALLATION
______________________________________
1. General_______
A. This procedure has instructions to remove and install the water aspirators. One water aspirator is installed at the interface of the ram-air duct and the heat exchanger of each air cooling pack.
TASK 21-51-11-004-001
2. Water Aspirator Removal (Fig. 401)_______________________
A. References
(1)
06-09-03/201, Body Section 44 Access Doors and Panels
(2)
21-51-11/501, Water Aspirator
(3)
IPC 21-51-60, Fig. 1, 2 and 3
B. Access
(1)
Location Zone
133 Air Conditioning Equipment Bay, LH
134 Air Conditioning Equipment Bay, RH
(2)
Access Panel
191E-L Air Conditioning Access Panel
191N-L Air Conditioning Access Door
192E-R Air Conditioning Access Panel
C. Prepare for the Removal
S 864-002
(1) Turn the applicable (1, 2, or 3) PACKS selector, on the overhead panel, P5, to the OFF position.
(a) Put a DO-NOT-OPERATE tag on the selector.
S 014-003
(2) Open or remove the applicable access door or panel (Ref 06-09-03/201):
-191E-L for pack 1 (access panel)
-191N-L for pack 2 (access door)
-192E-R for pack 3 (access panel)
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747-400 MAINTENANCE MANUAL
SEE A
FWD
SEE A
AIR CONDITIONING
EQUIPMENT BAY
AIR INLET
TUBE
BUSHING
NOZZLE
ASPIRATOR 0-RING
ASSEMBLY REDUCER
O-RING
WATER INLET HOSE
HEAT TEE
EXCHANGER
HEADER BULKHEAD NUT
DUCT
BACKUP RING
O-RING
FWD
HEADER
BOSS (REF) A HEAT EXCHANGER
Water Aspirator Installation
Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. 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 空调 AIR CONDITIONING 2(37)
