28-11-61
 ALL  ú ú 01 Page 206 ú Jul 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 OVERWING FILL PORT - REMOVAL/INSTALLATION
_________________________________________
 1.  General_______
 A.  There are two overwing fill ports, one in each main fuel tank (Fig. 401). Each overwing fill port is found on the upper surface of the wing.
 B.  This procedure contains two tasks. Ths first task removes the overwing fill port. The second task installs the overwing fill port.
 TASK 28-11-71-004-001
 2.  Remove the Overwing Fill Port (Fig. 401)_____________________________
 A.  Equipment
 (1)  Spanner Wrench - ST2580-302
 B.  References
 (1)  
AMM 28-10-00/201, Storage (Purging and Entry)

 (2)  
AMM 28-11-11/401, Wing Fuel Tank Access Panels

 (3)  
AMM 28-23-00/201, Defueling

 C.  Access
 (1)  
Location Zones
 305 Left Fuel Tank
 405 Right Fuel Tank

 (2)  
Access Panels
 7211L Wing Tank Access Door (Left)
 7411R Wing Tank Access Door (Right)

 D.  Procedure
 S 654-002
 (1)  
Defuel the applicable fuel tank (AMM 28-23-00/201).

 S 014-003

 (2)  
Remove wing fuel tank access panel No. 9 for the applicable wing (7211L or 7411R) (AMM 28-11-11/401).

 S 654-004
 WARNING:_______OBEY THE FUEL TANK ENTRY PRECAUTIONS. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR IF YOU DO NOT OBEY THE FUEL TANK ENTRY PRECAUTIONS.
 (3)  Do the Purging and Fuel Tank Entry procedure (AMM 28-10-00/201).
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 28-11-71
 ALL  ú ú 01 Page 401 ú Mar 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
OVERWING FILL PORTS ASEE
FILLER CAP  HANDLE 1 
SEAL 
LOCK 
LANYARD 
FWD 
ADAPTER 
UPPER SKIN WING  O-RINGS 
1  Overwing Fill Port Installation Figure 401 A THE WRONG DIRECTION. IF THE CAP IS INSTALLED IN CAN CAUSE THE HANDLE TO RELEASE THE FORWARD DIRECTION. RAM AIR THE ARROW ON THE CAP POINTS IN IN THE AFT DIRECTION. MAKE SURE MAKE SURE THE HANDLE CLOSES  SKIN WING UPPER NUT LUG SEAL RING RETAINING 

E84071
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 28-11-71
 ALL  ú ú 01 Page 402 ú Mar 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 494-005
 CAUTION:_______PUT MAINTENANCE MATS IN THE AREAS WHERE PERSONS WORK. THE THE MAINTENANCE MATS PREVENT DAMAGE TO THE WING PANELS.
 (4)  
Put maintenance mats on the surface of the wing in the areas you will work.

 S 024-006

 (5)  
Remove the filler cap from the overwing fill port.

 S 034-007

 (6)
Disconnect the detach lanyard from the lug on the retaining nut.

 S 034-027

 (7)  
Do these steps from inside the fuel tank:

 (a)  
Remove the lockwire between the retaining nut and the airplane structure.

 (b)  
Use the spanner wrench and remove the retaining nut from the adapter.

 (c)  
Remove the seal ring from the adapter.

 S 024-011
 (8)  Go out of the fuel tank to lift and remove the adapter through the opening in the upper wing skin.
 TASK 28-11-71-404-012
 3.  Install the Overwing Fill Port (Fig. 401)______________________________
 A. Equipment
 (1)  Spanner Wrench - ST2580-302
 B. References
 (1)  
AMM 12-11-00/301, Fuel Servicing

 (2)  
AMM 28-10-00/201, Storage (Purging and Entry)

 (3)  
AMM 28-11-11/401, Wing Fuel Tank Access Panels

　
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