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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