(2) 24-22-00/201, Manual Control
B. Access
(1) Location Zone
221 Control Cabin, LH
222 Control Cabin, RH
C. Prepare for the Procedure
S 865-050
(1)
Supply electrical power (AMM 24-22-00/201).
S 865-051
(2)
Start the air conditioning packs (AMM 21-00-00/201).
D. Procedure
S 865-052
(1)
Put the LOWER LOBE CARGO COND AIR FLOW RATE selector on the overhead P461 panel to LOW, BOTH.
S 865-053
(2)
Put the LOWER LOBE TEMP - FWD and LOWER LOBE TEMP - AFT temperature selectors on the overhead P5 panel to AUTO C.
S 715-054
(3)
Make sure on the EICAS ECS maintenance page that the zone LWR FWD, and LWR AFT trim valve positions decrease (move toward closed).
NOTE: The valves may take several minutes to move.
____
S 715-055
(4)
Make sure that the DUCT TEMP values for the zone LWR FWD and LWR AFT decrease.
S 715-056
(5)
Make sure that the Pack Discharge Temp for Packs 2 and 3 decrease.
NOTE: The pack discharge temperatures may already be at their
____
minimum, approximately 3 degrees C.
S 865-057
(6) Put the LOWER LOBE TEMP - FWD and LOWER LOBE TEMP - AFT temperature selectors to AUTO W.
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747-400 MAINTENANCE MANUAL
S 715-058
(7) Make sure on the EICAS ECS maintenance page that the zone LWR FWD and LWR AFT trim valve positions increase (move toward open).
NOTE: The valves may take several minutes to move.
____
S 715-059
(8)
Make sure that the DUCT TEMP values for the zone LWR FWD and LWR AFT increase.
S 865-060
(9)
Wait 5 minutes.
S 715-061
(10)
Make sure that none of these EICAS advisory messages show on EICAS:
(a)
PACK 1
(b)
PACK 2
(c)
PACK 3
(d)
TEMP ZONE
S 715-062
(11) Make sure that there are no temperature control system existing faults shown on the CMC.
E. Put the Airplane Back to its Usual Condition
S 865-063
(1)
Put the LOWER LOBE CARGO COND AIR FLOW RATE switch to OFF.
(2)
Stop the air conditioning packs (AMM 21-00-00/201).
S 865-065
(3)
Remove the electrical power if it is not necessary
(AMM 21-00-00/201).
S 865-064
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747-400 MAINTENANCE MANUAL
ZONE TEMPERATURE CONTROLLER - REMOVAL/INSTALLATION
__________________________________________________
1. General_______
A. The zone temperature controller is on the E2-4 electronics shelf in the main equipment center.
B. The removal task has an optional check for the stored shop faults.
TASK 21-61-01-004-001
2. Zone Temperature Controller Removal (Fig. 401)___________________________________
A. References
(1)
20-11-28/401, Rack-Mounted Electrical/Electronic Module
(2)
24-22-00/201, Manual Control
(3)
AMM 45-10-00/201, Central Maintenance Computer System
(4)
IPC 21-61-01
(5)
WDM 21-63-31
(6)
SSM 21-63-01
B. Access
(1) Location Zone
118 Electrical/Electronic Compartment, RH
C. Record the Shop Faults (Optional)
S 864-011
(1)
Supply electrical power (Ref 24-22-00/201).
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本文链接地址：747-400 AMM 飞机维护手册 空调 AIR CONDITIONING 2(126)
