(d)
A specific fuel quantity is not necessary for this task.
(e)
Electrical Power On (AMM 24-22-00/201).
(f)
Fuel System Card File serviceable (AMM 28-22-16/401).
(g)
Integrated Display System (IDS) serviceable (AMM 31-61-00/501).
(h)
Airplane must be in the ground mode (AMM 32-09-02/201).
(i)
CDU installed (AMM 34-61-02/401).
(j)
Central Maintenance Computer (CMC) serviceable (AMM 45-10-00/501).
E.
Prepare for the Test
(1)
Supply electrical power (AMM 24-22-00/201).
S 865-118
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S 865-149
WARNING:_______ MAKE SURE THESE CIRCUIT BREAKERS ARE OPEN AND DO-NOT-CLOSE TAGS
ARE ATTACHED. FAILURE TO OPEN THESE CIRCUIT BREAKERS COULD
CAUSE FUEL LEAKAGE. A FUEL LEAK CAN CAUSE A DANGEROUS
CONDITION FOR EQUIPMENT AND PERSONS.
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
On the left power distribution center, P414: 1) 414C5, FUEL OVRD/JTSN PUMP FWD 3 2) 414C2, FUEL OVRD/JTSN PUMP FWD 2 3) 414D2, OVRD/JTSN PUMP CTR L
(b)
On the right power distribution center, P415: 1) 415A38, FUEL OVRD/JTSN PUMP AFT 2 2) 415B38, FUEL OVRD/JTSN PUMP AFT 3 3) 415M32, OVRD/JTSN PUMP CTR R
S 865-139
WARNING: MAKE SURE THE FUEL JETTISON CONTROL SELECTOR SWITCH IS IN THE
_______ OFF POSITION. FAILURE TO PUT THE FUEL JETTISON CONTROL SELECTOR SWITCH TO THE OFF POSITION COULD CAUSE FUEL LEAKAGE. FUEL CAN FLOW FROM THE JETTISON NOZZLES WHICH CAN CAUSE A DANGEROUS CONDITION FOR EQUIPMENT AND PERSONS.
(3) Make sure the FUEL JETTISON control selector switch, on the fuel jettison module (P5 pilots' overhead panel) is in the OFF position.
S 865-138
WARNING: MAKE SURE THE TWO DEFUEL VALVE HANDLES AND THE TWO MANUAL
_______ SHUTOFF VALVE HANDLES ARE IN THE CLOSED POSITION. IF THE DEFUEL VALVES OR MANUAL SHUTOFF VALVE HANDLES ARE OPEN, FUEL CAN FLOW FROM THE FUEL-FEED MANIFOLD INTO THE REFUEL/JETTISON MANIFOLD. IF A JETTISON NOZZLE VALVE IS OPEN, FUEL CAN FLOW FROM THE WING TIPS AT THE JETTISON NOZZLES. A FUEL LEAK CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(4) Make sure the handles for the manual defuel valves and the manual shutoff valves (found at the left and right pressure refuel stations) are in the closed position.
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747-400 MAINTENANCE MANUAL
S 865-148
WARNING: MAKE SURE THERE IS NOT PRESSURE IN THE REFUEL/JETTISON
_______ MANIFOLD. IF THERE IS PRESSURE IN THE REFUEL/JETTISON MANIFOLD, A FUEL LEAKAGE CAN OCCUR. FUEL CAN FLOW FROM THE JETTISON NOZZLES WHICH CAN CAUSE A DANGEROUS CONDITION FOR EQUIPMENT AND PERSONS.
(5)
Wait a minimum of 1.5 hours after a refuel, defuel or fuel transfer operation to make sure the refuel/jettison manifold is not pressurized.
S 865-150
(6)
If it is necessary to do maintenance before the 1.5 hours time limit, do these steps to remove the pressure from the refuel/jettison manifold.
WARNING: DO THE PROCEDURE IN AMM 27-81-00/201 TO INSTALL THE LOCKS.
_______ THE FLAPS MOVE QUICKLY AND CAN CAUSE INJURY TO PERSONS AND DAMAGE TO THE AIRPLANE.
(a)
Install the locks on all the extended leading edge flaps (AMM 27-81-00/201).
(b)
Open the access door, 521CB, to get to the refuel control panel, P42.
(c)
Make sure the floodlights come on and there is power.
(d)
Make sure the fuel quantity gages show a fuel quantity (the fuel quantity gages are not blank).
(e)
Make sure the No. 2 and No. 3 main tanks are not full (at VTO).
(f)
Make sure the OVERFILL red light is not on.
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