(3)
Close the fan cowl panels (AMM 71-11-02/201).
S 445-032
(4)
Do the activation procedure for the thrust reverser
(AMM 78-31-00/201).
S 415-031
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A
737-300/400/500MAINTENANCE MANUAL
BLEED AIR ISOLATION VALVE - REMOVAL/INSTALLATION
________________________________________________
1. General_______
A. This procedure contains two tasks. The first task removes the bleed air isolation valve. The second task installs the bleed air isolation valve.
B. The bleed air isolation valve is installed in the keel beam, between the left and right crossover pneumatic manifold ducts. The bleed air isolation valve is accessible through an access hole in the keel beam. However, it is necessary to remove an air conditioning duct section in front of the keel beam access hole in order to remove or install the bleed air isolation valve.
TASK 36-11-25-004-001
2. Engine Bleed Air Isolation Valve Removal (Fig. 401)________________________________________
A. References
(1) AMM 36-05-00/201, Pneumatic System
B. Access
(1) Location Zones
212/214 Air Conditioning Equipment Bay
215 Keel Beam
C. Prepare to Remove the Valve
S 864-032
(1) Open the circuit breaker for the BLEED AIR ISOLATION VALVE, on the P6-4 panel, and attach a DO-NOT-CLOSE tag.
S 864-026
WARNING: YOU MUST REMOVE THE PRESSURE FROM THE PNEUMATIC SYSTEM BEFORE
_______ YOU REMOVE COMPONENTS FROM THE PNEUMATIC SYSTEM. THE HIGH PRESSURE AIR CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Remove the pressure from the pneumatic system (AMM 36-05-00/201).
(3)
Open both access doors for the air conditioning equipment bay.
S 024-033
(4)
Remove the air conditioning duct located in front of the keel beam access hole and parallel to the keel beam, to get more room to ease the valve removal.
S 014-002
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
ISOLATION VALVE
SEE A
ISOLATION
ELECTRICAL VALVE
CONNECTOR, ACTUATOR
D398
OVERHEAT
DETECTOR
LOOP
ISOLATION BONDING WIRE CROSSOVER DUCT FWD
KEEL BEAM VALVE
STRUCTURE
A
Bleed Air Isolation Valve Installation
Figure 401
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C96028
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737-300/400/500MAINTENANCE MANUAL
D. Remove the Valve
S 034-003
(1)
Remove the electrical connector from the valve.
S 034-004
(2)
Remove the bonding jumper from the valve.
S 864-007
(3)
Make sure you remove the pressure from the pneumatic system.
S 034-005
(4)
Remove the duct clamps from the valve.
S 024-008 中國航空網 m.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：737-300 400 500 AMM 飛機維護手冊 PNEUMATIC(71)
