NOTE: The fuel transfer with the jettison transfer valve
____ completely open should take approximately one minute.
 S 715-221
 (5)  
If the fuel quantity in the No. 4 main tank increases, the jettison transfer valve for the No. 3 main tank is in the open position.

 S 715-222

 (6)
Close these switches on the fuel management control module, M154:

 (a)  
OVRD 3 FWD

 (b)  
OVRD 3 AFT

 S 715-235
 (7)  
Have the person at the refuel control panel, P42, put the MAIN 4 refuel valve switch to the CLOSED position.

 S 715-223

 (8)  
Put the manual lever on the jettison transfer valve to the CLOSED position.

 I.  
Fuel Transfer Test - Left Jettison Transfer Valve for the Center Wing Tank - Valve Open

 S 715-215
 (1)  Do these steps to open the left jettison transfer valve in the center wing tank.
 NOTE: The jettison transfer valve is manually opened to find out
____ if the valve body is installed correctly. Test one jettison transfer valve at a time.
 (a)  Install the wing and body gear door locks (AMM 32-00-30/201).
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A 747-400 MAINTENANCE MANUAL
 (b) (c) (d)  Have a person go out to the rear spar area in the wheel-well for the left wing landing gear.Find the left jettison transfer valve actuator for the center wing tank (above the left override/jettison pump).Push the manual lever on the jettison transfer valve actuator to the OPEN position.
 (2)  S 715-236Have the person at the refuel control panel, P42, put the MAIN 1 refuel valve switch to the OPEN position.
 (3)  S 715-237Put these override/jettison pump switches on the fuel manangement control module, M154, to the ON position: (a) OVRD 2 FWD (b) OVRD 2 AFT
 (4)  S 715-238Monitor the fuel synoptic. (a) Make sure the fuel quantity for the No. 1 main tank increases. (b) Transfer a minimum of 600 lbs (300 kgs) of fuel.
 NOTE:____ The fuel transfer with the jettison transfer valve completely open should take approximately one minute.
 (5)  S 715-239If the fuel quantity in the No. 1 main tank increases, the left jettison transfer valve for the center wing tank is in the open position.
 (6)  S 715-240Close these switches on the fuel management control module, M154: (a) OVRD 2 FWD (b) OVRD 2 AFT

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 715-242
 (7)  
Have the person at the refuel control panel, P42, put the MAIN 1 refuel valve switch to the CLOSED position.

 S 715-241

 (8)  
Put the manual lever on the jettison transfer valve to the CLOSED position.

 J.  
Fuel Transfer Test - Right Jettison Transfer Valve for the Center Wing Tank - Valve Open

 S 715-188
 (1)  Do these steps to open the right jettison transfer valve in the center wing tank.
 NOTE: The jettison transfer valve is manually opened to find out
____ if the valve body is installed correctly. Test one jettison transfer valve at a time.
 (a)  
Have a person go out to the rear spar area in the wheel-well for the right wing landing gear.

 (b)  
Find the right jettison transfer valve actuator for the center wing tank (above the right override/jettison pump).

 (c)  
Push the manual lever on the jettison transfer valve actuator to the OPEN position.

 S 715-189
 (2)  
Have the person at the refuel control panel, P42, put the MAIN 4 refuel valve switch to the OPEN position.

 S 715-190

 (3)  
Put these override/jettison pump switches on the fuel manangement control module, M154, to the ON position:

 (a)  
OVRD 3 FWD

 (b)  
OVRD 3 AFT
　
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