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A B777's center fuel tank pump would not shut down; even below 2400 pounds. The circuit breakers were pulled at 300 pounds.
| Attributes | |
| ACN | 825553 |
| Time | |
| Date | 200903 |
| Place | |
| State Reference | FO |
| Aircraft 1 | |
| Make Model Name | B777-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Route In Use | Oceanic |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Fuel Booster Pump |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Experience | Flight Crew Last 90 Days 240 Flight Crew Total 15000 Flight Crew Type 6000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Called while on break. Aircraft's left center fuel pump wouldn't turn off. Quantity ran down to 300 lbs -- should stop at 2400 lbs on heavy B777. Pump cycled on/off several times per minute with switch off. Two first officers went into east&east compartment with maintenance provided instructions and pulled the circuit breaker for the pump. This is a repeat problem with this pump on this aircraft. Pump stopped. Quantity increased over time to 1300 lbs before scavenge pump emptied tank. Flight continued to destination with no further problem.
Original NASA ASRS Text
Title: A B777's center fuel tank pump would not shut down; even below 2400 pounds. The circuit breakers were pulled at 300 pounds.
Narrative: Called while on break. Aircraft's left center fuel pump wouldn't turn off. Quantity ran down to 300 lbs -- should stop at 2400 lbs on heavy B777. Pump cycled on/off several times per minute with switch off. Two First Officers went into E&E compartment with maintenance provided instructions and pulled the circuit breaker for the pump. This is a repeat problem with this pump on this aircraft. Pump stopped. Quantity increased over time to 1300 lbs before scavenge pump emptied tank. Flight continued to destination with no further problem.
Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.