(f)
For the left 2.9 bleed valve, use the torque adapter to remove the bolts which attach the 2.9 bleed valve to the engine.
(g)
For the right 2.9 bleed valve, remove the bolts which attach the 2.9 bleed valve and support brackets to the engine.
(h)
Remove the 2.9 bleed valve from the engine.
(i)
Remove the gasket from the boss.
1) Discard the gasket.
S 024-055-N00
(2) If it is necessary to replace the 2.9 bleed valve, do the steps that follow:
(a) Remove the tube adapter and gasket from the 2.9 bleed valve. 1) Discard the gasket.
S 024-056-N00
(3) If necessary, remove the screen for the 2.9 bleed valve with the
steps that follow:
(a) Remove the screw from the center of the screen.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
75-32-03
ALL ú ú N02 Page 407 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(b)
Remove the four screws which attach the screen to the flange of the 2.9 bleed valve.
(c)
Remove the screen.
(d)
Install the protection cover on the opening.
S 024-057-N00
(4) Install the protection caps to the openings on the engine boss, 2.9 bleed duct, and 2.9 bleed valve.
TASK 75-32-03-404-013-N00
3. Install the 2.9 Bleed Valve (Fig. 401)
___________________________
A. Equipment
(1) M303, M305, or M307 Bergen Mechanical Crimper
Bergen Cable Technologies Inc
170 Gregg St
P.O. Box 1300
Lodi, NJ 07644-9982
(2)
PWA 85436 - Torque Adapter, Pratt and Whitney,
Commercial Products Division, 400
Main Street, East Hartford, CT
06108
(3)
Bonding Meter (AMM 20-22-01/601)
(4)
Gun - Heat, 120°F (50°C) maximum temperature output
B.
Consumable Materials
(1)
D00390 Oil - Engine
(2)
G00964 Compound - Antigalling, Fel-Pro C-200
(3)
B00148 Solvent - Methyl Ethyl Ketone (MEK), TT-M-261
(4)
A00303 Adhesive - RTV 174
(5)
G02334 Lockwire - AS3214-02
(6)
G02332 Ferrule - P05-292 (Optional)
(7)
G02335 Cable - Safety - P05-291 (Optional)
C.
References
(1)
AMM 20-22-01/601, Electrical Bonding
(2)
AMM 70-23-00/201, Tightening Techniques and Torque Values
(3)
AMM 71-00-00/501, Power Plant
(4)
AMM 71-11-04/201, Fan Cowl Panels
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
75-32-03
ALL ú ú N02 Page 408 ú Jun 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(5)
AMM 71-11-06/201, Core Cowl Panels
(6)
AMM 78-31-00/201, Thrust Reverser System
(7)
IPC 75-32-03 Fig. 5
D.
Access
(1)
Location Zone
412 Engine 1 - HPC Aft Case 1 or 10 o'clock
422 Engine 2 - HPC Aft Case 1 or 10 o'clock
432 Engine 3 - HPC Aft Case 1 or 10 o'clock
442 Engine 4 - HPC Aft Case 1 or 10 o'clock
(2)
Access Panel
415 Left Thrust Reverser Half - Engine 1
416 Right Thrust Reverser Half - Engine 1
425 Left Thrust Reverser Half - Engine 2
426 Right Thrust Reverser Half - Engine 2
435 Left Thrust Reverser Half - Engine 3
436 Right Thrust Reverser Half - Engine 3
445 Left Thrust Reverser Half - Engine 4
446 Right Thrust Reverser Half - Engine 4
E.
Prepare to Install the 2.9 Bleed Valve
S 424-058-N00
(1) If it is necessary to install a new 2.9 bleed valve, do the steps that follow:
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 大气 AIR 2(73)
