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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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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本文链接地址：747-400 AMM 飞机维护手册 燃油 FUEL 4(16)
