(2)
Controlled source of dry air or nitrogen, 75 psig maximum pressure.
B.
Consumable Materials
(1)
G00095 Detector - Leak, Leak-Tek (160X)
C.
References
(1)
AMM 06-09-09/201, Nacelle and Engine-to-Wing Fairing Access Doors and Panels
(2)
AMM 12-12-01/301, Hydraulic Systems
(3)
AMM 24-22-00/201, Manual Control
(4)
AMM 29-11-00/201, Main Hydraulic Supply System
(5)
AMM 36-00-00/201, Pneumatic System
(6)
AMM 54-62-00/201, Nacelle Strut Access Panels
(7)
AMM 54-62-02/501, Nacelle Strut Access Door
D.
Access
(1)
Location Zone
454 System 1 - Strut Aft Fairing
464 System 2 - Strut Aft Fairing
462 System 2 - Strut Torque Box - Left Side
474 System 3 - Strut Aft Fairing
472 System 3 - Strut Torque Box - Left Side
484 System 4 - Strut Aft Fairing
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-17-00
ALL ú ú 04 Page 501 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(2) Access Panel 454AL Trailing Edge Fairing Doors - System 1 464AL Trailing Edge Fairing Doors - System 2 462HL Access Door - Lower Midspar Aft Pressure Relief -
System 2
474AL Trailing Edge Fairing Doors - System 3
472HL Access Door - Lower Midspar Aft Pressure Relief -
System 3 484AL Trailing Edge Fairing Doors - System 4
E. Procedure
S 865-002
(1)
Supply electrical power (AMM 24-22-00/201).
S 865-003
(2)
Remove the pressure from the pneumatic system (AMM 36-00-00/201).
S 015-004
(3)
Open the applicable doors in the trailing edge fairing
(AMM 06-09-09/201 and AMM 54-62-00/201).
S 015-005
(4)
For hydraulic systems 2 and 3, open the aft access door for pressure relief in the lower midspar (AMM 06-09-09/201 and AMM 54-62-00/201).
S 865-006
(5)
Put the switch, L ISLN (R ISLN), for the wing isolation valve, on the overhead panel, P5, to the OFF position.
S 865-007
(6)
Open the bleed valve on the reservoir pressurization module to remove the pressure from the reservoir (AMM 29-11-00/201).
S 615-008
(7)
Drain or fill the hydraulic reservoir, if it is necessary, until you can see the fluid level in the top sight glass (AMM 12-12-01/301).
S 485-009
(8)
Connect a pressure gage to the port GA on the reservoir
pressurization module.
(9)
Pressurize the pneumatic system with the APU (AMM 36-00-00/201).
S 865-010
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-17-00
ALL ú ú 06 Page 502 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 975-058
(10)
Monitor the pressure gage which you connected to the reservoir pressurization module.
S 865-033
(11)
Put the switch, L ISLN (R ISLN), for the wing isolation valve to the open position.
S 975-034
(12)
Make a record of the time for the reservoir pressure to increase to 20 psig and then to 35 psig.
S 975-035
(13)
Make sure the time to pressurize the reservoir to 20 psig and to 35 psig is not more than these limits: ~................................................................. | | Reservoir | Maximum Time to | | | Pressure (psig) | Pressurize (seconds) | ................................................................... | System 1 or 4 | 20 | 55 | | | 35 | 125 | ................................................................... | System 2 or 3 | 20 | 30 | | | 35 | 65 | 2..................…...................…..........................1
S 795-012
(14) 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(72)
