(2)
Put a DO-NOT-OPERATE tag on the PACKS switch.
S 866-035
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747-400 MAINTENANCE MANUAL
S 866-036
(3) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6 Main Power Distribution Panel
1) 6F35, PACK TEMP CONT A
2) 6F36, PACK TEMP CONT B
(b)
P415 Power Distribution Center - Right
1) 415C38, PACK TEMP CONT B
2) 415K27, PACK TEMP CONT A
C. Do the Inspection
S 026-032
(1)
Remove the seven screws from the forward hinge at the forward section of the ram air inlet door.
S 016-034
(2)
Lower the forward section of the ram air inlet door.
S 216-033
(3)
Do a visual inspection of the forward and aft hinges on the ram air inlet door as follows:
(a)
Make sure there is no corrosion, cracks, or wear on the forward and aft hinges.
(b)
Make sure the forward and aft hinges can move freely and smoothly.
(c)
Do a detailed inspection of the hinges if you find that the hinges have corrosion, cracks, or wear, or that the hinges do not move freely or smoothly (AMM 21-62-02/601).
S 416-035
(4)
Lift the forward section of the ram air inlet door into its
position.
S 426-033
(5)
Install the seven screws and tighten to 50 - 75 inch-pounds
(5.65 to 8.47 newton-meters).
D. Put the Airplane Back to Its Usual Condition
S 866-037
(1)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P6 Main Power Distribution Panel
1) 6F35, PACK TEMP CONT A
2) 6F36, PACK TEMP CONT B
(b)
P415 Power Distribution Center - Right
1) 415C38, PACK TEMP CONT B
2) 415K27, PACK TEMP CONT A
(2)
Remove the DO-NOT-OPERATE tag on the PACKS switch.
S 866-038
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747-400 MAINTENANCE MANUAL
RAM AIR INLET DOOR ACTUATOR - REMOVAL/INSTALLATION
__________________________________________________
1. General_______
A. This procedure has two tasks. The first task is the removal of the actuator for the door at the ram air inlet. The second task is the installation of the actuator for the door at the ram air inlet.
B. The removal of the actuator has these steps:
-Get access to the actuator
-
Remove power from the pack control system
-
Remove the actuator.
C. The installation of the actuator has these steps:
-Install the actuator
-Retract the actuator
-Do a test of the actuator.
TASK 21-62-03-004-001
2. Ram Air Inlet Door Actuator Removal (Fig. 401)___________________________________
A. References
(1)
AMM 06-09-02/201, Body Section 42 Access Doors and Panels
(2)
IPC 21-62-14 Fig. 1
B. Access
(1)
Location Zone 123 Wing to Body Fairing, Forward Lower Half, LH 124 Wing to Body Fairing, Forward Lower Half, RH
(2)
Access Panels
191VL WING/BODY FAIRING SEC 42 (Pack 1)
191ZL WING/BODY FAIRING SEC 42 (Pack 2)
191AHL WING/BODY FAIRING (Pack 2)
192VR WING/BODY FAIRING SEC 42 (Pack 3)
C. Prepare to Remove the Actuator 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 空调 AIR CONDITIONING 2(172)
