S 862-049
(12)
Release the pressure in the pneumatic system if it is not necessary (AMM 36-00-00/201).
TASK 29-17-01-002-050
8. Bleed Valve Removal (Fig. 201)
___________________
A. References
(1)
AMM 36-00-00/201, Pneumatic System
(2)
AMM 54-62-00/201, Nacelle Strut Access Panels
B.
Access
(1)
Location Zone
454 System 1 - Strut Aft Fairing
464 System 2 - Strut Aft Fairing
474 System 3 - Strut Aft Fairing
484 System 4 - Strut Aft Fairing
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A
747-400
MAINTENANCE MANUAL
(2)
Access Panel
454AL Trailing Edge Fairing Doors - System 1
464AL Trailing Edge Fairing Doors - System 2
474AL Trailing Edge Fairing Doors - System 3
484AL Trailing Edge Fairing Doors - System 4
C.
Procedure
S 012-051
(1) Open the doors in the trailing edge fairing (AMM 54-62-00/201).
S 862-088
WARNING: YOU MUST RELEASE THE PRESSURE IN THE PNEUMATIC SYSTEM BEFORE
_______ YOU OPEN THE PNEUMATIC SYSTEM. THE AIR, WHICH HAS HIGH TEMPERATURE AND PRESSURE, CAN CAUSE INJURY TO PERSONS.
(2)
Release the pressure in the pneumatic system (AMM 36-00-00/201).
S 862-053
(3)
Operate the bleed valve (13), if it is serviceable, to release the pressure in the reservoir.
S 022-054
WARNING: IF THE BLEED VALVE WILL NOT MOVE TO THE OPEN POSITION, YOU
_______ MUST REMOVE THE BLEED VALVE VERY SLOWLY. THIS WILL DECREASE THE AIR PRESSURE IN THE RESERVOIR SAFELY. IF YOU REMOVE THE BLEED VALVE QUICKLY, THE PRESSURE IN THE RESERVOIR WILL RELEASE SUDDENLY. THIS CAN CAUSE INJURY TO PERSONS.
(4)
Remove the bleed valve (13) from the reservoir pressurization module (1).
S 032-089
(5)
Remove the packing (14) from the bleed valve (13).
TASK 29-17-01-402-055
9. Bleed Valve Installation (Fig. 201)
________________________
A. Consumable Materials
(1)
D00567 Lubricant - Skydrol Assembly Lube, MCS 352
(2)
G00095 Detector - Leak, Leak-Tek (160X)
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747-400 MAINTENANCE MANUAL
B. Parts
~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 201 | 1 | Reservoir Pressurization Module | 29-17-01 | 02 | 1 | | | 13 | Bleed Valve | | | 70 | | | 14 | Packing | | | 75 | 2......…........…...................................…..........….....….........1
C. References
(1)
AMM 36-00-00/201, Pneumatic System
(2)
AMM 54-62-00/201, Nacelle Strut Access Panels
(3)
AMM 54-62-02/501, Nacelle Strut Access Doors
D.
Access
(1)
Location Zone
454 System 1 - Strut Aft Fairing
464 System 2 - Strut Aft Fairing
474 System 3 - Strut Aft Fairing
484 System 4 - Strut Aft Fairing
(2)
Access Panel 454AL Trailing Edge Fairing Doors - System 1 464AL Trailing Edge Fairing Doors - System 2 474AL Trailing Edge Fairing Doors - System 3 484AL Trailing Edge Fairing Doors - System 4
E.
Procedure
S 642-056
(1)
Apply some lubricant to the packing (14) and the threads of the bleed valve (13).
(2) 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 液压 HYDRAULIC 2(80)
