S 715-075
(6)
Make sure all of the indication lights for the refuel valves come on.
S 715-076
(7)
Do one of these procedures (METHOD 1 or METHOD 2) to make sure the VTO system operates correctly.
H.
METHOD 1; Fill the Airplane with Fuel to the VTO Level
S 715-193
(1)
Continue the manual pressure refuel operation with all of the refuel valves open.
S 715-194
(2)
Completely fill each tank.
S 715-195
(3)
At the VTO level for each tank, the FQPU will command the refuel valves to the closed position.
(4)
Make sure the refuel valves close and that overfill does not occur.
S 785-197
(5)
After all indication lights for the refuel valves go off, set the control switches for the manual refuel valves to the closed position.
S 715-196
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747-400 MAINTENANCE MANUAL
S 865-198
CAUTION: MAKE SURE YOU CLOSE EACH MANUAL SHUTOFF VALVE ON THE RECEPTACLE
_______ AND THE MANUAL DEFUELING VALVE. DAMAGE TO THE REFUEL OR JETTISON MANIFOLD CAN EASILY OCCUR.
(6)
Close the manual shutoff valves at the fueling receptacles.
S 865-199
(7)
Do this procedure: Put the Airplane in the Usual Condition.
I.
METHOD 2; Use the TEST SYS Switch to Test the Refuel Valve Shutoff
NOTE: The TEST SYS switch on the refuel control panel, P42, commands the
____
FQPU to close the refuel valves (simulated VTO).
S 715-200
(1)
Continue the manual pressure refuel operation with all of the refuel valves open.
S 715-201
(2)
Push the TEST SYS switch and hold it until the indicator lights for the refuel valves go off.
NOTE: All the indicator lights for the refuel valves should go off
____
at approximately the same time.
S 715-202
(3)
Release the TEST SYS switch.
S 715-203
(4)
After 10 seconds, make sure all of the indication lights for the refuel valves come on.
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747-400 MAINTENANCE MANUAL
S 715-204
(5)
Make sure the refuel operation starts again.
S 865-078
(6)
Put the control switches for the manual refuel valves to the closed position.
S 865-079
CAUTION: MAKE SURE YOU CLOSE EACH MANUAL SHUTOFF VALVE ON THE RECEPTACLE
_______ AND THE MANUAL DEFUELING VALVE. DAMAGE TO THE REFUEL OR JETTISON MANIFOLD CAN EASILY OCCUR.
(7)
Close the manual shutoff valves at the fueling receptacles.
S 865-205
(8)
Do this procedure: Put the Airplane in the Usual Condition.
J.
Put the Airplane Back to Its Usual Condition
S 865-081
(1) Stop the fuel flow at the fuel truck.
NOTE: The fueling manifold continues to be pressurized for
____ approximately 10 minutes after you stop the fuel flow at the truck. You can release the pressure on the fueling manifold more quickly. Find a fuel tank that is not full to its capacity. Set the switch for that refuel valve to the OPEN position. This releases the pressure on the fueling manifold into that tank.
S 945-032
(2) Disconnect the ground cable for the fueling nozzle (if it is installed) from the ground jacks on the wing.
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本文链接地址：747-400 AMM 飞机维护手册 燃油 FUEL 2(30)
