S 864-062
(2)
Remove the electrical power if it is not necessary
(AMM 24-22-00/201).
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(3) Close the access panel, 191M-L (AMM 06-09-03/201).
TASK 21-61-08-704-063
4. Trim Air Pressure Regulating and Shutoff Valve Test___________________________________________________
A. References
(1)
AMM 06-09-03/201, Body Section 44 Access Doors and Panels
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 31-61-00/201, Integrated Display System
(4)
AMM 36-00-00/201, Pneumatic Sytem
(5)
AIPC 21-61-68, Fig. 4
(6)
AIPC 21-61-10, Fig. 10
(7)
AIPC 21-61-10, Fig. 10A
(8)
AIPC 21-21-56, Fig. 2
(9)
WDM 21-61-93
(10)
SSM 21-61-05
B. Access
(1)
Location Zone
133 Air Conditioning Equipment Bay, LH
(2)
Access Panels
191M-L Air Conditioning Access Panel
C. Procedure
S 864-064
(1)
Supply electrical power (AMM 24-22-00/201).
S 864-065
(2)
Supply power to EICAS (AMM 31-61-00/201).
S 864-032
(3)
Operate the air conditioning pack(s) while you monitor the EICAS ECS maintenance page (AMM 21-00-00/201).
S 864-066
(4)
Make sure the TRIM AIR PRESS indication, on the EICAS ECS maintenance page, is between 5.0 and 10.0.
(5)
Put the TRIM AIR switch to OFF at the P5 overhead panel.
S 864-068
(6)
Make sure the TRIM AIR PRESS indication, on the EICAS ECS maintenance page, is between 0.0 and 0.5.
S 864-069
(7)
Do a check of the electrical and pneumatic connections if the trim air PRSOV does not operate correctly.
S 864-067
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(8) Put the TRIM AIR switch to ON.
S 794-035
WARNING:_______DO NOT TOUCH THE DUCTS. THE DUCTS ARE VERY HOT AND CAN BURN YOU VERY BADLY IF YOU TOUCH THEM.
(9) Examine the joints between the ducts and the trim air PRSOV for air leaks.
NOTE: Small air leaks are ok, large air leaks must be corrected.
____ Align the clamps or the joints to decrease the air leakage if it is necessary.
S 864-036
(10)
Shut down the air conditioning pack(s) (AMM 21-00-00/201).
(11)
Close the access panel, 191M-L (AMM 06-09-03/201).
S 414-037
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747-400 MAINTENANCE MANUAL
FLIGHT DECK FLOW REGULATING VALVE - REMOVAL/INSTALLATION
________________________________________________________
1. General
________
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本文链接地址：747-400 AMM 飞机维护手册 空调 AIR CONDITIONING 2(146)
