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B737 flight crew reported experiencing a fuel imbalance in cruise flight and a possible fuel leak. After some checking; the fuel leak was confirmed; the associated engine was shut down and the flight diverted to the nearest suitable alternate. Maintenance cannot find a fuel leak and the flight data recorder (fdr) indicated that fuel mismanagement was the likely culprit.
| Attributes | |
| ACN | 1385357 |
| Time | |
| Date | 201609 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Route In Use | Oceanic |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Fuel Crossfeed |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 125 Flight Crew Total 12000 Flight Crew Type 1400 |
| Person 2 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Type 1462 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Inflight Event / Encounter Fuel Issue |
Narrative:
Flight in a B737. At FL360; aircraft showed a fuel imbalance of 1;100 pounds with the #1 engine lower on fuel quantity. Fuel imbalance was getting gradually worse. Engine fuel flows were the same. Suspecting a fuel leak; we shut the engine down; advised ATC; and diverted to the nearest suitable airport. Landed uneventfully.
Original NASA ASRS Text
Title: B737 flight crew reported experiencing a fuel imbalance in cruise flight and a possible fuel leak. After some checking; the fuel leak was confirmed; the associated engine was shut down and the flight diverted to the nearest suitable alternate. Maintenance cannot find a fuel leak and the Flight Data Recorder (FDR) indicated that fuel mismanagement was the likely culprit.
Narrative: Flight in a B737. At FL360; aircraft showed a fuel imbalance of 1;100 pounds with the #1 engine lower on fuel quantity. Fuel imbalance was getting gradually worse. Engine fuel flows were the same. Suspecting a fuel leak; we shut the engine down; advised ATC; and diverted to the nearest suitable airport. Landed uneventfully.
Data retrieved from NASA's ASRS site 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.