(3)
For automatic regulation of flight deck temperature, set the desired temperature with the FLT DECK selector knob on the cabin temperature control module. For manual control, set the knob to MAN and hold it to W or C to increase or decrease flight deck temperature.
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MAINTENANCE MANUAL
(4)
For automatic control of the upper deck and crew rest area temperature, enter the desired temperature for the applicable zone at the digital cabin temperature selector.
(5)
For automatic regulation of cargo compartment temperature, set the desired temperature with the MAIN DECK TEMP FWD, MAIN DECK TEMP AFT, LOWER LOBE TEMP FWD, or LOWER LOBE TEMP AFT selector knob on the cabin temperature control module. For manual control, set the knob to MAN and hold it to W or C to increase or decrease the applicable cargo compartment temperature.
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747-400 MAINTENANCE MANUAL
ZONE TEMPERATURE CONTROL SYSTEM - ADJUSTMENT/TEST
_________________________________________________
1. General_______
A. This procedure has the following tasks:
(1)
TRIM AIR SYSTEM ground test.
(2)
Main deck cargo, upper deck, and flight deck temperature control test.
(3)
Lower Lobe forward and aft cargo temperature control test
TASK 21-61-00-705-010
2. Trim Air System Ground Test___________________________
A. References
(1) 24-22-00/201, Manual Control
B. Access
(1) Location Zone
221 Control Cabin, LH
222 Control Cabin, RH
C. Prepare for the Test
S 865-001
(1)
Supply electrical power (Ref 24-22-00/201).
S 865-002
(2)
Push the TRIM AIR switch-light, on the P5 panel, to the OFF position.
S 865-003
(3)
Turn the LOWER LOBE CARGO COND AIR FLOW RATE selector, on the overhead maintenance panel, P461, to the OFF position.
S 865-005
(4)
Prepare the CDU for the test:
(a)
Push the MENU key on the CDU to show the MENU.
(b)
Push the line select key (LSK) that is adjacent to <CMC to show the CMC menu.
(c)
If <RETURN shows after you push the LSK, push the LSK that is adjacent to <RETURN until you see the CMC MENU.
(d)
Push the LSK that is adjacent to <GROUND TESTS to show the GROUND TESTS menu.
(e)
Push the LSK that is adjacent to <21 AIR CONDITIONING to show the GROUND TESTS menu for the air conditioning system.
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(f) Push the NEXT PAGE key until you find <TRIM AIR SYSTEM.
NOTE: If INHIBITED shows above <TRIM AIR SYSTEM, the test
____
will not operate.
(g) If INHIBITED shows above <TRIM AIR SYSTEM: 1) Push the LSK that is adjacent to the test prompt. 2) Do the steps shown on the CDU (Push the NEXT PAGE key to
see all the steps.). 3) Push the LSK that is adjacent to <RETURN to show the ground test menu again.
D. Trim Air System Ground Test
S 715-006
(1) Push the LSK that is adjacent to <TRIM AIR SYSTEM.
NOTE: IN PROGRESS shows during the test.
____
S 715-007
(2) When IN PROGRESS goes out of view, look for PASS or FAIL> adjacent to <TRIM AIR SYSTEM.
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