(Continued
CENTER TANK BOOST PUMP LEFT and CENTER TANK BOOST
next page)
PUMP RIGHT circuit breakers for center fuel tank.
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Fuel feed system operable. PROCEDURE 17 PROCEDURE 2 PROCEDURE 3 PROCEDURE 4 PROCEDURE 6
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BOOST PUMP 115 V AC CIRCUIT BREAKER IS OPEN - Visually inspect each end of the conduit to make sure that the Teflon sleeves are visible and there is no fuel leak into the conduit. IF -
If installed, remove and examine the boost pump conduit wire
NOT OK
bundle (AMM 28-22-00/601). Repair any problems that you find.
Do not reconnect the electrical connector. Close the circuit breaker for the applicable pump. Put the applicable pump switch to the ON position. Wait five minutes. Put the applicable pump switch to the OFF position. The circuit breaker should remain closed. IF -
115 V AC CIRCUIT BREAKER OPENS WITH PUMP
NOT OK
DISCONNECTED - PROCEDURE 7
OK
Make sure the LOW PRESSURE lights for the center tank are off.
Make sure the LOW PRESSURE lights for the No. 1 and No. 2 tanks are on.
*[1] To operate any of the fuel boost pumps, you must be in the flight compartment to continuously monitor the fuel quantity and the low pressure indication in the fuel tank. Immediately put the applicable fuel boost pump switch(es) to OFF if the LOW PRESSURE light comes on and stays on.
28-22-0 May 01/03 Page 114 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
PROCEDURE 7
Reconnect the boost pump electrical connector. Make sure there is sufficient fuel in the tank (see the General section). Put the applicable pump switch to the ON position for five minutes. *[1] The circuit breaker should remain closed. The low pressure light should not come on and stay on. Put the applicable pump switch to OFF.
*[1] To operate any of the fuel boost pumps, you must be in the flight compartment to continuously monitor the fuel quantity and the low pressure indication in the fuel tank. Immediately put the applicable fuel boost pump switch(es) to OFF if the LOW PRESSURE light comes on and stays on.
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5. Restore Airplanes to Normal
A. Remove leading edge flap locks (Ref 27-81-0 MP).
WARNING: LEADING EDGE FLAPS ARE FAST ACTING AND CAN CAUSE SERIOUS INJURY TO PERSONNEL.
B. Remove electrical power if no longer required.
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ENGINE FUEL FEED SYSTEM -MAINTENANCE PRACTICES
1.
Two procedures, an engine performance deterioration (engine run) test and a vacuum test, are provided to check the engine fuel feed lines and fittings. The engine performance test requires specific fuel quantities, but no special equipment. The vacuum test requires special test equipment and empty fuel tanks.
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