S 865-028
(14)
Push the WARMER switch until the zone target temperature is 29.
S 715-029
(15)
Make sure on the EICAS ECS maintenance page that the U/D zone trim valve position increases (moves toward open).
NOTE: The valve may take several minutes to respond.
____
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747-400 MAINTENANCE MANUAL
S 715-030
(16)
Make sure that the DUCT TEMP value for the U/D zone increases.
S 865-031
(17)
Push the ZONE SELECT switch on the cabin temperature selector until the zone display shows C.
S 865-032
(18)
Push the WARMER switch until the zone target temperature is 29.
S 715-033
(19)
Make sure on the EICAS ECS maintenance page that the C/R zone trim valve position increases (Moves toward open).
NOTE: The valve may take several minutes to move.
____
S 715-034
(20)
Make sure that the DUCT TEMP value for the C/R zone increases.
S 865-035
(21)
Put the MAIN DECK TEMP - AFT temperature selector on the overhead P5 panel to AUTO C.
S 865-036
(22)
Put the MAIN DECK TEMP - FWD temperature selector to AUTO W.
S 715-037
(23)
Make sure on the EICAS ECS maintenance page that the zone MAIN FWD trim valve position increases (Moves toward open).
NOTE: The valve may take several minutes to move.
____
S 715-038
(24)
Make sure that the DUCT TEMP values for the zone MAIN FWD increases.
(25)
Put the MAIN DECK TEMP - AFT temperature selector to AUTO W.
S 865-039
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747-400
MAINTENANCE MANUAL
S 715-040
(26) Make sure on the EICAS ECS maintenance page that the pack 1, 2, and 3 pack discharge temperatures increase.
NOTE: The temperatures may take several minutes to increase.
____
S 865-041
(27)
Wait until the ZONE TEMP for zones F/D, U/D, C/R, MAIN FWD, and MAIN AFT read 79 degrees F (26 degrees C) or more.
S 865-042
(28)
Put the MAIN DECK - FWD, MAIN DECK - AFT, and FLT DECK temperature selectors to AUTO.
S 865-043
(29)
Push the RESET switch on the cabin temperature selector.
S 865-044
(30)
Wait 5 minutes.
S 715-045
(31)
Make sure that none of the following EICAS advisory messages show on EICAS:
(a)
PACK 1
(b)
PACK 2
(c)
PACK 3
(d)
TEMP ZONE
S 715-046
(32) 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 865-047
(1)
Stop the air conditioning packs (AMM 21-00-00/201).
S 865-048
(2)
Remove the electrical power if it is not necessary
(AMM 24-22-00/201).
TASK 21-61-00-705-049
4. Lower Lobe Forward and Aft Cargo Temperature Control Test
_________________________________________________________
A. References
(1) 21-00-00/201, Air Conditioning System
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本文链接地址：747-400 AMM 飞机维护手册 空调 AIR CONDITIONING 2(125)
