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时间:2011-04-11 09:00来源:蓝天飞行翻译 作者:航空
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____
 strainer housing is 15 cubic inches.

 S 422-031
 (2)  Put the washer and fuel strainer in the strainer cap.
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747-400 MAINTENANCE MANUAL
 S 642-038
 (3)  
Lubricate the new O-ring with the petrolatum.

 S 432-037

 (4)  
Install the O-ring on the fuel strainer cap.

 S 432-032

 (5)  
Install the strainer cap in the fuel strainer housing.

 S 432-034

 (6)  
Torque the cap to 250 pound-inches.

 S 432-033

 (7)  
Lockwire the strainer cap to the fuel strainer housing.

 G.
External Leak Check - Fuel Strainer Housing Cap


 S 862-047
 (1)  
Supply the electrical power (AMM 24-22-00/201).

 S 652-041

 (2)  
Make sure at least one main tank contains 2500 lbs/1200 kgs.


 NOTE: Enough fuel to operate a fuel boost pump.
____
 (a)  Add or transfer fuel if it is necessary (AMM 12-11-01/301) (AMM 28-26-00/201).
 S 762-045
 (3)  
Do a leak check of the fuel strainer housings:

 (a)  
Put all of the crossfeed valve switches to the ON position.

 (b)  
Put one or more of the boost pump switches to the ON position.


 NOTE: Make sure the applicable fuel tank contains enough fuel
____
 to operate the pump.

 (c)  
Operate the boost pump(s) for 5 minutes.

 (d)  
Monitor the fuel strainer housings for leaks.

 (e)  
After 5 minutes, put the boost pump(s) to the off position.


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747-400 MAINTENANCE MANUAL
 (f)  
Put the crossfeed valves to the off position.

 (g)  
Visually examine the fuel strainer housing for leaks. 1) No fuel leaks are permitted at the fuel strainer housings. 2) If a fuel strainer housing does leak, then repair any


 problems that you find.
 H. Put the Airplane Back to the Usual Condition
 S 082-048
 WARNING: DO THE PROCEDURE IN AMM 32-00-30/201 TO REMOVE THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  
Remove the door locks for the wing and body gear (AMM 32-00-30/201).

 (2)
Remove electrical power, if it is not necessary (AMM 24-22-00/201).


 S 862-046
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747-400
MAINTENANCE MANUAL

ASEE FUEL SCAVENGE SYSTEM  HOUSING SEE B FUEL STRAINER 
REAR SPAR OF THE CENTER WING TANK (REF) 
A FUEL SCAVENGE SYSTEM 
FUEL STRAINER HOUSING  STRAINER FUEL  CAP STRAINER 
WASHER 
SEE  C 
TANK (REF) CENTER WING OF THE REAR SPAR  O-RING  LOCKWIRE 
INBD  NUT  DATE OF ASSY: STRAINER, FUEL 90` SERVICABLE SHAW AERO DEVICES 
B FUEL STRAINER HOUSING  STRAINER CAP WASHER  C 99321ASSY92-7144 S/N: S343U001-1 HOUSING STRAINER 
Figure 201 Fuel Strainer 

B51973
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