757 AMM 飞机维护手册 燃油 CHAPTER 28 - FUEL 2(41)

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 adapters have a housing which contains a poppet, piston and a
 FUEL/DEFUEL cam. The adapters mate with a standard type
 fueling nozzle.
 ú
 ú  NOTE: The 757 aircraft does not have a fuel jettison system,____
 ú  therefore fuel adapter caps are not required to be
 ú  installed on the fuel adapters.
 ú
 (2) Function
 (a) With the FUEL/DEFUEL cam in the FUEL position, fuel pressure
 forces the poppet to open. The open poppet prevents reverse
 fuel flow when the fueling operation is complete.

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757
MAINTENANCE MANUAL

FUELING STATION
A
Fueling Adapter Figure 4 (Sheet 1)
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757
MAINTENANCE MANUAL

 (b)  
With the FUEL/DEFUEL cam in the DEFUEL position, the poppet and piston interlock to permit reverse fuel flow when the fueling nozzle is attached.

 E.
Fueling Control Panel (Fig. 4A)

 (1)  
The fueling control panel, P28, is installed forward of the front spar on the right wing between the two fueling adapters. The fueling control panel has switches and indicators for fueling and defueling (AMM 28-26-00/201) operations.

 NOTE: If you can not read the nomenclature on the fueling control
____ panel, you can install placards (AMM 11-24-01/201).
 F. Fueling Manifold Vent Valve (Fig. 5)
 (1)  
The fueling manifold vent valve attaches to the right fueling manifold. The vent valve lets air to be vented from the fuel tank into the fueling manifold to drain the trapped fuel into the fuel tank.

 G.
Drain Check Valves for the Fueling Manifold (Fig. 5)

 

FUELING ADAPTER

Fueling Adapter
Figure 4 (Sheet 2)

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