757 AMM 飞机维护手册 燃油 CHAPTER 28 - FUEL 2(94)

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 H.  Three phase 115 vac, 400 Hertz electrical current powers the boost pumps. Twenty-eight vdc powers the valves and control circuits.
 2.  Component Details_________________
 A.  Engine Fuel Shutoff Valve (Fig. 2)
 (1)  The engine fuel shutoff valve is a motor actuated butterfly type valve. An engine fuel shutoff valve actuator mounts to the rear spar of each main fuel tank. The valve body (within the fuel tank) connects to the actuator (outside the fuel tank) by an adapter shaft. Access to the valve body requires defueling.
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757
MAINTENANCE MANUAL

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PRESSURE SWITCH
FOR THE LEFT FORWARD

PRESSURE SWITCHFUEL BOOST PUMP
FOR THE RIGHTFORWARD FUELLEFT FORWARD
BOOST PUMPFUEL BOOST PUMPCENTER FUEL TANK CENTER FUEL TANK RIGHT FORWARDFUEL BOOST PUMP
DRAIN CHECK
WATER SCAVENGE
WATER SCAVENGE
CENTER TANK
VALVE FOR THE
JET PUMP
JET PUMP
FUEL SCAVENGE
FUELING MANIFOLD
SYSTEM JET PUMP
TO REFUEL
VAPOR TO THE ENGINE RETURN LINE
VAPOR(EXAMPLE) RETURNTO THE ENGINE
FUEL INTAKE
LINE VALVE FOR THEDRAIN CHECK
(EXAMPLE)
ENGINE ENGINE
FUELING MANIFOLDDRY BAY DRY BAY TANK END RIGHT MAIN
BAFFLE RIB TANK FUEL TANK
CHECK VALVES END BAFFLE RIBLEFT MAIN CHECK VALVES
P
FUEL TANK P
PM M M
SURGERECEPTACLESSUPRESSING
RIGHT CENTER
APU LEFT
STANDPIPE
WATER
FUEL OVERRIDE
DC CENTER
ACTUATOR FOR THE
LEFT AFT
PUMP
PUMP FUEL
RIGHT CENTER
FUEL BOOST
RIGHT AFT
OVER-
FUELING SHUTOFF
PUMP
SCAVENGE
FUEL BOOST
RIDE
WATER SCAVENGE
VALVE
ACTUATOR FORJET PUMP
LEFT DEFUELING
PUMP
ACTUATOR FOR THEPUMP
JET PUMP
THE APU FUEL
PRESSURE SWITCHPRESSURE SWITCH
VALVE
ACTUATOR FOR THE
SHUTOFF VALVE
FOR THE RIGHT FOR THE RIGHT
ACTUATOR FOR THE
RIGHT DEFUELING
ACTUATOR
CENTER FUEL AFT FUEL
ACTUATOR FOR THEFOR THE
VALVE
ACTUATOR FOR THE
PRESSURE SWITCH
OVERRIDE PUMP BOOST PUMP FUEL
　
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