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時間:2011-04-11 09:13來源:藍天飛行翻譯 作者:航空
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 equipment.
 (g)  
If disconnected, connect the fuel supply hose to the
 quick-disconnect (disconnect service panel).


 (h)  
Do these steps to connect the main fuel supply hose to the engine fuel pump. 1) Put a gasket, main fuel supply hose and bracket on the


 inlet port of the fuel pump. 2) Lubricate the threads of the bolts with engine oil. 3) Install the hose and the bracket to the inlet port of the
 engine fuel pump with the bolts and the washers. 4) Tighten the bolts to 198-242 pound-inches
 (22.4 - 27.3 Newton-meters).
 S 784-090
 (2)  METHOD 2;
_________
 Fuel Pressure Leak Check.

 (a)  Make sure the fuel line from the front spar to the engine pump is completely installed.
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 28-22-07
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (b)  Supply the electrical power (AMM 24-22-00/201).
 CAUTION: DO NOT OPERATE THE OVERRIDE/JETTISON PUMPS DRY FOR MORE
_______ THAN THREE MINUTES. YOU CAN DAMAGE AN OVERRIDE/JETTISON PUMP IF YOU OPERATE IT DRY FOR MORE THAN THREE MINUTES.
 (c)  Make sure the No. 2 or 3 main tank, or center wing tank contains enough fuel to operate an override/jettison pump.
 NOTE: At different pitch and roll attitudes the fuel quantity
____ that is necessary to cover the fuel pump inlets will change. Refer to the fuel pump inlet graphs (AMM 28-31-01/401).
 1) The minimum fuel that is necessary in the No. 2 or 3 main tank is 12,500 pounds (5700 kilograms). 2) The minimum fuel that is necessary in the center wing tank is 15,000 pounds (6800 kilograms).
 (d)  
Add fuel if it is necessary (AMM 12-11-01/301).

 (e)  
For the applicable engine, close the circuit breaker and remove the DO-NOT-CLOSE tag: 1) On the main power distribution panel, P6:

 (f)  
Put these flight compartment switches to the on (valve open) position: 1) FUEL X FEED 1 2) FUEL X FEED 2 3) FUEL X FEED 3 4) FUEL X FEED 4

 (g)  
Put the applicable FUEL CONTROL switch to the RUN position.

 (h)  
Put one of these flight compartment switches for the override/jettison pumps to on: 1) OVRD 2 FWD or AFT 2) OVRD 3 FWD or AFT 3) CTR L or R

 (i)  
Do a visual inspection of the fuel line in the strut area and at the engine fuel pump with the fuel line pressurized.


 a)  6G01  FUEL SHUTOFF VALVE ENG 1
 b)  6G02  FUEL SHUTOFF VALVE ENG 2
 c)  6G03  FUEL SHUTOFF VALVE ENG 3
 d)  6G04  FUEL SHUTOFF VALVE ENG 4

 NOTE: No fuel leaks are permitted.
____
 (j)  If there is a fuel leak, do these steps:
 1)  Put the applicable override/jettison pump switch to the off position, and the FUEL CONTROL switch to CUTOFF.
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 ALL  ú ú 01B Page 453 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 2)  Do the steps in this procedure to remove the fuel from the fuel line in the strut area.
 CAUTION: YOU CANNOT TIGHTEN THE FUEL LINE COUPLING AFTER THE
_______ INITIAL INSTALLATION. YOU MUST INSTALL A NEW O-RING WHEN YOU TIGHTEN THE FUEL LINE COUPLING OR A FUEL LEAK CAN OCCUR.
 3)  If a coupling has a leak, disconnect the coupling, replace the O-rings, and then connect the coupling again (AMM 28-00-00/201). a) Make sure the O-ring(s) are lubricated with the
 petrolatum. 4) If a fuel tube has a leak, replace the fuel tube. 5) Do the steps in this procedure again to pressurize the
 applicable fuel line and check for leaks.
 (k)  When the fuel line is satisfactory (no leaks), do these steps: 1) Put the applicable override/jettison pump switch to off. 2) Put the FUEL CONTROL switch to CUTOFF. 3) Put the FUEL X FEED switches 1, 2, 3, and 4 to the off
 (valve closed) position.
 S 794-091
 (3)  
Do the applicable sections of this task: Leak Check of the Strut Area (AMM 54-53-00/201).
 
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本文鏈接地址:747-400 AMM 飛機維護手冊 燃油 FUEL 3(24)

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