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747-400 MAINTENANCE MANUAL
 2)  FUEL X FEED 4 (ADVISORY)
 S 865-271
 (5)  Look at the fuel synoptic display. (a) Make sure the No. 4 crossfeed valve symbol is white and the flowbar in the valve symbol is perpendicular to the fuel-feed segment.
 S 715-272
 (6)  Put these fuel boost pump switches on the fuel management control module, M154, to the ON position: (a) MAIN 4 FWD (b) MAIN 4 AFT
 S 715-273
 (7)  Look at the fuel synoptic. (a) Wait for two minute. (b) Make sure the fuel quantity in the No. 3 main tank does not increase.
 S 715-310
 (8)  If the fuel quantity in the No. 3 main tank does not increase, the No. 4 crossfeed valve is in the closed position.
 S 715-274
 (9)  Do these steps to open the crossfeed valve for the No. 4 main tank. (a) Put this switch on the fuel management control module, M154, to the on position: 1) FUEL X FEED 4 (b) Look at the light indication in the FUEL X FEED 4 switch. 1) Make sure the amber VALVE indication light comes on and then goes off. 2) Make sure the white flowbar indication light comes on. (c) Look at the main and auxiliary EICAS displays. 1) Make sure these EICAS messages do not show: a) FUEL X FEED 4 (STATUS) b) FUEL X FEED 4 (ADVISORY)
 S 715-360

 (10)
 Monitor the fuel synoptic.

 (a)  
Make sure the valve symbol for the No. 4 crossfeed valve shows the correct valve open symbol.

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747-400 MAINTENANCE MANUAL
 (b)  
Make sure the fuel quantity for the No. 3 main tank increases.

 (c)  
Transfer a minimum of 500 lbs (300 kgs) of fuel.

 NOTE: The fuel transfer with the valve completely open should
____ take approximately one minute.
 S 715-312
 (11)
 If the fuel quantity in the No. 3 main tank increases, the No. 4 crossfeed valve is in the open position.

 S 715-275

 (12)
 Put these switches on the fuel management control module, M154, to the off position.

 (a)  
MAIN 4 FWD

 (b)  
MAIN 4 AFT

 (c)  
FUEL X FEED 4

 S 715-276
 (13)
 Put this switch on the refuel control panel, P42, to the closed position.

 (a)  
MAIN 3 refuel valve

 S 715-277
 (14)
 Look at the main and auxiliary EICAS displays.

 (a)  
Make sure these EICAS messages do not show:
 1) FUEL X FEED 4 (STATUS)
 2) FUEL X FEED 4 (ADVISORY)

 S 715-278
 (15)
 Continue to test the other crossfeed valves, (if necessary) or do this procedure; Put the Airplane Back to the Usual Condition.

 J.
Put the Airplane Back to the Usual Condition

 S 655-241
 (1)  Transfer fuel if it is necessary to balance the fuel tanks
 (AMM 28-26-00/201).

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747-400 MAINTENANCE MANUAL
 S 865-311
 (2)  
Make sure all of the switches for the fuel boost pumps and override jettison pumps are in the off postion.

 S 865-312

 (3)  
Put the manual shutoff valve handles (outboard) for the left and right wing to the CLOSED position.

 S 865-242

 (4)  
Put the manual defuel valve handles for the left and right wing to the CLOSED position.

 (a)  
Put the lockwire on the manual defuel valve handles.

 S 415-243
 (5)
Close the pressure refuel station access doors, 521BB and 621BB.

 S 415-244

 (6)  
　
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