(f)  
Open the pressure refuel access door, 621BB (right wing). 1) Open the manual shutoff valve handle on the outboard refuel

 receptacle. 2) Remove the lockwire from the manual defuel valve handle. 3) Put the manual defuel valve handle in the OPEN position.
 F. No. 1 Crossfeed Valve - Fuel Transfer Test
 S 865-233
 (1)  
Have a person at the refuel panel, P42, put the MAIN 2 refuel valve switch to the OPEN position.

 S 865-230

 (2)  
Look at the fuel management control module, M154.

 (a)  
Make sure the white flowbar light and the amber VALVE indication light do not show in this switch: 1) FUEL X FEED 1

 S 865-231
 (3)  
Look at the main and auxiliary EICAS displays.

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

 S 865-232
 (4)  
Look at the fuel synoptic display.

 (a)  
Make sure the No. 1 crossfeed valve symbol is white and the flowbar in the valve symbol is perpendicular to the fuel-feed segment.

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A 747-400 MAINTENANCE MANUAL
 S 715-234
 (5)  Put these fuel boost pump switches on the fuel management control module, M154, to the ON position: (a) MAIN 1 FWD (b) MAIN 1 AFT
 S 715-235
 (6)  Look at the fuel synoptic. (a) Wait for two minutes. (b) Make sure the fuel quantity in the No. 2 main tank does not increase.
 S 715-304
 (7)  If the fuel quantity in the No. 2 main tank does not increase, the No. 1 crossfeed valve is in the closed position.
 S 715-236
 (8)  Do these steps to open the crossfeed valve for the No. 1 main tank. (a) Put this switch on the fuel management control module, M154, to the on position: 1) FUEL X FEED 1 (b) Look at the light indication in the FUEL X FEED 1 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 1 (STATUS) b) FUEL X FEED 1 (ADVISORY)
 S 715-301
 (9)  Monitor the fuel synoptic. (a) Make sure the valve symbol for the No.1 crossfeed valve shows the correct valve open symbol. (b) Make sure the fuel quantity for the No. 2 main tank increases.

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A
747-400
MAINTENANCE MANUAL

 (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 715-302
 (10)
 If the fuel quantity in the No. 2 main tank increases, the No. 1 crossfeed valve is in the open position.

 S 715-237

 (11)
 Put these switches on the fuel management control module, M154, to the off position:

 (a)  
MAIN 1 FWD

 (b)  
MAIN 1 AFT

 (c)  
FUEL X FEED 1

 S 715-238
 (12)
 Put this switch on the refuel control panel, P42, to the CLOSED position:

 (a)  
MAIN 2 refuel valve

 S 715-239
 (13)
 Look at the main and auxiliary EICAS displays.

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

 S 715-240
 (14)
 Continue to test the other crossfeed valves, or do this procedure, Put the Airplane Back to the Usual Condition.

 G.
No. 2 Crossfeed Valve Fuel Transfer Test

 S 865-246
 (1)  
Have the person at the refuel panel, P42, put the MAIN 1 refuel valve switch to the OPEN position.
　
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