757 AMM 飞机维护手册 燃油 CHAPTER 28 - FUEL 2(113)

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 main landing gear doors.
 The engine fuel crossfeed valve is found approximately 12
 inches to the left of the middle of the body on the center
 tank rear spar.

 S 435-025
 (19)
 Install the electrical connector on the pressure switch on the left fuel override pump (S10010).

 S 215-026

 (20)
 Make sure these EICAS advisory messages do not show on the top display:

 (a)
L FWD FUEL PUMP

 (b)
L AFT FUEL PUMP

 S 215-027
 (21)
 Make sure the EICAS message, L FUEL SYS PRESS, shows on the top display.

 S 215-028

 (22)
 Make sure these low pressure lights on the P5 panel come on:

 (a)
L FWD PUMPS PRESS

 (b)
L AFT PUMPS PRESS

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757 MAINTENANCE MANUAL
 (c)  
R FWD PUMPS PRESS

 (d)  
R AFT PUMPS PRESS

 S 865-029
 (23)
 Open this circuit breaker on the P11 panel:

 (a)  
11D36, FUEL CROSSFEED

 S 215-030
 (24)
 Make sure the EICAS message, FUEL CROSSFEED, shows on the top display.

 S 865-031

 (25)
 Close this circuit breaker on the P11 panel:

 (a)  
11D36, FUEL CROSSFEED

 S 215-032
 (26)
 Make sure the EICAS message, FUEL CROSSFEED, does not show on the top display.

 S 865-033

 (27)
 Open this circuit breaker on the P11 panel and attach DO-NOT-CLOSE tag:

 (a)  
11D36, FUEL CROSSFEED

 E.  
GUN 011-049, 105-999; Test the Engine Fuel Crossfeed Valves

 S 865-343
 (1)  
Push the FUEL XFEED VALVE - AFT and FUEL XFEED VALVE - FWD switches to the on position.

 S 865-344

 (2)  
Open these circuit breakers on the P11 panel:

 (a)  
11A19, FWD FUEL CROSSFEED

 (b)  
11A20, AFT FUEL CROSSFEED

 (c)  
11D36, FUEL XFEED IND

 (3)  
Make sure FUEL XFEED VALVE - AFT switch-light on the P5 panel is on.

 S 215-345
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