S 024-013
(4)
Disconnect the electrical connectors (DM7329) from the module and install caps on the electrical connectors.
S 024-014
(5)
Remove the cabin temperature control module.
TASK 21-61-11-404-004
3. Cabin Temperature Control Module Installation (Fig. 401)
_____________________________________________
A. References
(1)
AIPC 21-61-00 Fig. 05
(2)
AMM 21-00-00/201, Air Conditioning Packs
(3)
AMM 21-44-00/501, Aft cargo heating system
(4)
AMM 21-58-00/501, Equipment cooling system
(5)
AMM 21-61-00/501, Zone Temperature Control
(6)
AMM 24-22-00/201, manual control
(7)
SSM 21-61-05
(8)
WDM 21-24-11, WDM 21-25-11, WDM 21-25-21, WDM 21-44-11, WDM 21-51-11, WDM 21-51-11, WDM 21-51-22, WDM 21-51-23, WDM 21-58-11, WDM 21-58-14, WDM 21-58-21, WDM 21-61-93
B. Access
(1) Location Zone
222 Control Cabin
C. Procedure
S 024-015
(1)
Remove the protective caps on the electrical connectors.
S 424-016
(2)
Connect the electrical connectors (DM7329) to the cabin temperature control module.
S 414-017
(3)
Install the module in the P5 panel.
S 424-018
(4)
Tighten the four screws that attach the cabin temperature control module in the P5 panel.
D. Put the airplane back to its usual condition
S 864-006
(1) Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a) P6 Main Power Distribution Panel
1) 6L8, EQUIPMENT COOLING PCA
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
2) 6H28, OVHD RECIRC FAN 3) 6H29, UNDERFLOOR RECIRC FAN CONT
(b)
P7 Overhead Circuit Breaker Panel
1) 7H9, AFT CARGO HEAT CONT
(c)
P180 DC power distribution panel: 1) 180F11, GASPER FAN CONT 2) PK 1 FLOW CONT VLV 3) 180J2, PK 1 PROTECTION 4) 180F2, PK 2 PROTECTION 5) 180J17, PK 3 PROTECTION 6) 180F4, EQUIPMENT COOLING VALVE CONT 7) 180H30, EQUIPMENT COOLING EXHAUST FAN CONT
E. Cabin Temperature Control Module Operational Test
S 864-012
(1)
Supply electrical power (AMM 24-22-00/201).
S 704-009
(2)
Do the aft cargo compartment heating system - system test
(AMM 21-44-00/501).
S 704-010
(3)
Do the equipment cooling ground test (AMM 21-58-00/501).
S 734-011
(4)
Do these test within the temperature control system - system test (AMM 21-61-00/501):
(a)
Manual temperature control test
(b)
Alternate temperature control test
1) Alternate mode test
2) Temperature bulb test
(5)
Push the Gasper air switch and make sure that gasper fan operates.
S 864-014
(6)
Disconnect electrical power if it is not necessary
(AMM 24-22-00/201).
S 864-011
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
TRIM AIR PRESSURE SENSOR - REMOVAL/INSTALLATION
_______________________________________________
1. General_______
A. This procedure has two tasks. The first task is the removal of the pressure sensor for the trim air. The second task is the installation of the pressure sensor.
TASK 21-61-13-004-001
2. Trim Air Pressure Sensor Removal (Fig. 401)________________________________
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