ACCESS
DOOR

ACCESS FUEL DOOR MEASURING STICK WING LOWER LOWER
SKIN WING SKIN
GASKET GASKET (KNITTED
(KNITTED ALUMINUM)
ALUMINUM)
CLAMP RING
MOUNTING BOLT CLAMP
(23 LOCATIONS) RING
B  MOUNTING BOLT (23 LOCATIONS)
Fuel Tank Access Doors
Figure 2 (Sheet 1)

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757
MAINTENANCE MANUAL

PRESSURE
RELIEF VALVE

O-RING
ACCESS DOOR
WING SKIN (LOWER SURFACE)
GASKET
(KNITTED ALUMINUM)

BOLT CLAMP RING
MOUNTING BOLT  NUTPLATE
SURGE TANK ACCESS DOOR,
543AB OR 643AB

LOWER WING SKIN
C
RING ASSEMBLY SEAL
HOUSING OF THE VENT FLAME ARRESTOR
ACCESS DOOR
SURGE TANK ACCESS DOOR, 543BB OR 643BB
D
Fuel Tank Access Doors Figure 2 (Sheet 2)
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757
MAINTENANCE MANUAL

OVERWING FILL PORT

Overwing Fill Ports
Figure 3

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757
MAINTENANCE MANUAL

 (2)  
Each overwing fill port has an adapter, seal ring, two O-rings, a retaining nut, and a quick release filler cap. Lift and turn the handle on the filler cap counterclockwise to unlock the filler cap. It is then lifted from the adapter. Installation reverses the procedure and the downward turn of the handle locks and seals the filler cap against the adapter.

 C.
Sump Drain Valves (Fig. 4)

 (1)  
Six sump drain valves permit manual drainage of accumulated water and sediment from the fuel tanks. One sump drain valve is installed flush to the lower wing surface at the low point of each main fuel and surge tank. Two sump drain valves are installed flush to the lower surface of the center fuel tank. Drain lines attached to the sump drain valves in the center fuel tank extend to drain line fittings on the wing-to-body fairings.
　
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本文鏈接地址：757 AMM 飛機維護手冊 燃油 CHAPTER 28 - FUEL 1(19)