S 434-015
(8)
Tighten the poppet seat (4) to 100-120 pound-inches.
S 794-012
(9)
Operate the primary poppet two or three times and make sure that no leakage occurs when the primary poppet engages.
S 414-013
(10)
If the primary poppet for the fuel sump drain valve in the center wing tank is installed, close the access panel, 191G or 192G.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-11-04
ALL ú ú 01 Page 405 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
OVERWING FILL PORT - REMOVAL/INSTALLATION
_________________________________________
1. General
_______
A. This procedure contains instructions to remove and install an overwing fill port.
B. The overwing fill ports are found in the top surface of each main fuel tank.
C. The access to the retaining nut for an overwing fill port is through the fuel tank access door found on the bottom of the applicable main fuel tank.
TASK 28-11-05-004-001
2. Overwing Fill Port Removal (Fig. 401)
__________________________
A. Equipment
(1)
ST2580-302 - Torque Spanner
(2)
Maintenance Mats - for wing upper surface
B.
References
(1)
AMM 28-11-00/201, Fuel Tanks
(2)
AMM 28-11-02/401, Reserve and Main Tank Access Door
(3)
AMM 28-26-00/201, Defueling
(4)
AIPC 28-11-54, Fig. 1
C.
Access
(1)
Location Zones 541 Inbd Main Tank (Part), Front Spar to Mid Spar, Left 543 Outbd Main Tank (Part), Front Spar to Mid Spar, Left 641 Inbd Main Tank (Part), Front Spar to Mid Spar, Right 643 Outbd Main Tank (Part), Front Spar to Mid Spar, Right
(2)
Access Panels
544AB Fuel Tank Access Door
546BB Fuel Tank Access Door
644AB Fuel Tank Access Door
646BB Fuel Tank Access Door
D.
Procedure
(1)
Defuel the applicable main fuel tank (AMM 28-26-00/201).
S 654-002
S 864-003
WARNING: OBEY ALL OF THE FUEL TANK PURGING AND ENTRY PRECAUTIONS.
_______ INJURY TO PERSONS OR DAMAGE TO THE AIRPLANE CAN OCCUR.
(2) Remove the fuel from the fuel tank and prepare the fuel tank for an entry (AMM 28-11-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-11-05
ALL ú ú 01 Page 401 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 014-004
(3) Remove the other tank access doors, if necessary, to get access to the overwing fill port (AMM 28-11-02/401).
NOTE: Refer to the table that follows for the necessary access.
____
~.................................................................. | Tank | Access Door | ....................................................................
| No. 1 Main Tank | 546BB |
| No. 2 Main Tank | 544AB |
| No. 3 Main Tank | 644AB |
| No. 4 Main Tank | 646BB |
2.....................................…............................1
S 864-005
(4)
Go into the fuel tank (AMM 28-11-00/201).
S 034-006
(5)
Disconnect the filler cap lanyard from the retaining nut.
S 034-027
(6)
Remove the lockwire from the retaining nut and airplane structure.
S 034-007
(7)
Use a torque spanner and remove the retaining nut from the fill port.
S 034-008 中國航空網 m.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：747-400 AMM 飛機維護手冊 燃油 FUEL 1(120)
