S 035-118
(13)
Remove the ICU altitude switch breakout box:
(a) Open these circuit breakers:
1) P6 Main Power Distribution Panel a) 6L6, CABIN PRESS MAN L b) 6L7, CABIN PRESS MAN R c) 6J28, CABIN PRESS AUTO A d) 6J29, CABIN PRESS AUTO B e) 6J30, CABIN PRESS ICU CONT L f) 6J31, CABIN PRESS ICU CONT R
2) P414 Left Power Distribution Center a) 414M8, CABIN PRESS ICU L b) 414B8, CABIN PRESS ICU R
(b)
Remove the ICU altitude switch breakout box from the ICU's and the connectors DM7950B and DM7951B.
(c)
Install connector DM7950B on the left ICU and DM7951B on the right ICU.
F. Put the Airplane Back to its Usual Condition
S 865-119
(1) Close these circuit breakers:
(a) P6 Main Power Distribution Panel
1) 6L6, CABIN PRESS MAN L
2) 6L7, CABIN PRESS MAN R
3) 6J28, CABIN PRESS AUTO A
4) 6J29, CABIN PRESS AUTO B
5) 6J30, CABIN PRESS ICU CONT L
6) 6J31, CABIN PRESS ICU CONT R
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(b) P414 Left Power Distribution Center
1) 414M8, CABIN PRESS ICU L
2) 414B8, CABIN PRESS ICU R
S 865-120
(2) Remove the electrical power, if it is not necessary (AMM 24-22-00/201).
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PRESSURIZATION OUTFLOW VALVE - REMOVAL/INSTALLATION
___________________________________________________
1. General_______
A. There are two tasks in this procedure. There is one task for the removal and one task for the installation of the left and the right pressurization outflow valves. The procedure has these parts:
(1)
The removal of power to the valves
(2)
The removal of the access panel from the aft bulkhead of the bulk cargo compartment
(3)
The removal of the valve
(4)
The installation of the valve
(5)
A test of the valve.
B. For the replacement of the outflow valve actuator assembly (ac motor, dc motor and gear housing), refer to AMM 21-31-07/401. For the replacement of the ac motor, refer to AMM 21-31-06/401. For the replacement of the dc motor, refer to AMM 21-31-08/401.
TASK 21-31-01-004-001
2. Pressurization Outflow Valve Removal (Fig. 401)____________________________________
A. Standard Tools and Equipment
(1) Knife, plastic (nonmetallic)
B. References
(1) AIPC 21-31-01, Fig. 2
ACCESS DOOR
Pressurization Outflow Valve Installation
Figure 401 (Sheet 1)
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MAINTENANCE MANUAL
3. DC MOTOR
CONNECTOR
DC MOTOR 4. AC MOTOR
CONNECTOR
2. SCREEN AC MOTOR
5. POTENTIOMETER
CONNECTOR
POSITION
POTENTIOMETER
SEE B
7. SCREW
8. WASHER
9. NUT
1. OUTFLOW
VALVE
ASSEMBLY 6. BONDING JUMPER
(2 LOCATIONS) 10. BOLT
A GEAR CASE 11. WASHER
LAMINATED SHIM
(2 LOCATIONS)
BRACKET
SEALANT 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 1(112)
