28-22-05
 ALL  ú ú 01 Page 404 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

(ROTATED 90`) A-A
PREPARE THE FAYING SURFACE OF THE VALVE BODY AND MOUNTING BRACKET FOR AN ELECTRICAL SURFACE BOND (SWPM 20-20-00).
Engine Spar Valve Body Installation
Figure 401 (Sheet 2)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-05
 ALL  ú ú 01 Page 405 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
L06384
A
747-400
MAINTENANCE MANUAL

5. VALVE BODY
MARKER
VALVE BODY

Engine Spar Valve Body Installation
Figure 401 (Sheet 3)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-05
 ALL  ú ú 01 Page 406 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
L06595
A
747-400
MAINTENANCE MANUAL

POSITION VALVE SO THAT THE "TOP" POSITION MARKER IS DOWN.
(ROTATED 90`)
WHEN THE VALVE DISK IS CLOSED, THE ALIGNMENT ARROWS ARE DOWN.
B-B
Engine Spar Valve Body Installation Figure 401 (Sheet 4)
L06202
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-05
 ALL  ú ú 01 Page 407 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

VALVE BODY

Engine Spar Valve Body Installation
Figure 401 (Sheet 5)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-05
 ALL  ú ú 01 Page 408 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
L06312
A
747-400
MAINTENANCE MANUAL

 (6)  
SWPM 20-20-00, Electrical Ground and Bond

 D.
Access

 (1)  
Location Zones 542 Inbd Main Tank (Part), Front Spar to Mid Spar, Left 551 Outbd Main Tank (Part), Front Spar to Mid Spar, Left 642 Inbd Main Tank (Part), Front Spar to Mid Spar, Right 651 Outbd Main Tank (Part), Front Spar to Mid Spar, Right

 (2)  
Access Panels
 545BB Fuel Tank Access Door
 552EB Fuel Tank Access Door
 552FZ Mid Spar Access Door
 645BB Fuel Tank Access Door
 652EB Fuel Tank Access Door
 652FZ Mid Spar Access Door

 E.
Procedure

 S 164-038
 (1)  
AIRPLANES WITH A BARE METAL SURFACE AT THE MOUNTING BRACKET; Prepare the mating surfaces of the valve body (5) and mounting bracket (6) for a faying surface bond (SWPM 20-20-00).

 S 824-023

 (2)  
NO. 2 AND 3 ENGINE SPAR VALVES (VIEW B);
 Do these steps to correctly align the valve body (5):

 (a)  
Make sure the valve actuator (1) is in the closed position.

 (b)  
Install the valve body (5) so that the TOP position indication is on top of the valve (nearest the wing upper skin).

 (c)  
Engage the valve body (5) with the adapter shaft (3).

 (d)  
Make sure the index marks on the valve body (5) align.

 NOTE: The index marks on the valve body must be on the top
____ when the valve is closed (nearest the wing upper skin).
　
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 2(125)