2. Component Details
_________________
 A. Access Doors (Fig. 2)
 (1)  
Forty-five access doors permit entry into the airplane fuel tanks for inspection or component repair. The oval shaped access doors fit in each fuel tank over cutouts in the lower wing surface. For all except one access door, a clamp ring with a knitted aluminum gasket bolted to the access door from outside the wing holds the access door in its position. The gasket forms an electrical bond between the access door and the wing skin. A molded rubber seal ring prevents fluid leakage around the access door. The remaining access door (vent scoop door) bolts to a nut plate attached to the inside of the lower wing surface. A rubber seal and an O-ring prevent fuel leakage. Removal of an access door requires fuel tank defueling (AMM 28-26-00/201).

 (2)  
Each main fuel tank has 16 access doors. Each access door measures 10 x 18 inches except for three farthest outboard access doors. These access doors measure 8 x 18 inches. Five main tank access doors have fuel measuring sticks attached to their inside surface (AMM 28-44-00/001).

 (3)  
The center fuel tank has 7 access doors. Each access door measures 10 x 18 inches. Two access doors have fuel measuring sticks attached to their inside surface (AMM 28-44-00/001). The center fuel tank has 3 baffle doors in the center section of the fuel tank.

 (4)  
Each surge tank has three access doors. Two access doors measure 8 x 18 inches. A housing of the vent flame arrestor is attached to the inside of the center access door (vent scoop door) which is 10 x 18 inches. A pressure relief valve is attached to the inside of the most inboard access door.

 B.
Overwing Fill Ports (Fig. 3)

 (1)  
An overwing fill port is installed for each main fuel tank. Each overwing fill port is found on the upper wing surface about two thirds of the way out on the wing. The overwing fill ports permit an alternate way of fueling the main fuel tanks if pressure fueling equipment is not available.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-11-00
 ALL  ú ú 09 Page 3 ú May 28/99

A

757
MAINTENANCE MANUAL

SEE A
MOLDED
RUBBER SEAL
GASKET
LOWER MOUNTING WING BOLT SKIN
IN THE
FUEL TANK

A
ASEE SEE  B  ASEE SEE  B  SEE  A  SEE ASEE  C  SEE  A 
SEE  D 
SEE  B 
SEE  A 

LEFT WING CALLOUTS SHOWN (RIGHT WING OPPOSITE) RUBBER SEAL
GASKETACCESS DOOR
CLAMP RING
CLAMP RING
　
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機維護手冊 燃油 CHAPTER 28 - FUEL 1(18)