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B717 captain reports checking fuel just prior to descent for landing and finding all normal. During descent a fuel imbalance is annunciated with the left tank indicating 3;000 pounds less than the right. Thinking fuel leak an emergency is declared with a diversion to a closer airport. During approach the fuel imbalance disappears and the left tank again indicates the same as the right.
| Attributes | |
| ACN | 1009103 |
| Time | |
| Date | 201205 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B717 (Formerly MD-95) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Fuel Quantity-Pressure Indication |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Inflight Event / Encounter Fuel Issue |
Narrative:
I had just checked the total fuel on board (fob) and the landing fob and all indications were normal. Minutes later; during the descent into destination airport; the master caution illuminated; fuel imbalance; low fuel and 1;200 pounds indicating in the left main tank with 4;300 pounds indicating in the right main tank. Thinking fuel leak; we declared an emergency and diverted. Just as we were intercepting the final approach coarse; the left main tank started fluctuating up and down finally settling on 4;300 pounds. It was a fuel indication problem.
Original NASA ASRS Text
Title: B717 Captain reports checking fuel just prior to descent for landing and finding all normal. During descent a fuel imbalance is annunciated with the left tank indicating 3;000 LBS less than the right. Thinking fuel leak an emergency is declared with a diversion to a closer airport. During approach the fuel imbalance disappears and the left tank again indicates the same as the right.
Narrative: I had just checked the total Fuel on Board (FOB) and the landing FOB and all indications were normal. Minutes later; during the descent into destination airport; the master caution illuminated; Fuel Imbalance; low fuel and 1;200 LBS indicating in the left main tank with 4;300 LBS indicating in the right main tank. Thinking fuel leak; we declared an emergency and diverted. Just as we were intercepting the final approach coarse; the left main tank started fluctuating up and down finally settling on 4;300 LBS. It was a fuel indication problem.
Data retrieved from NASA's ASRS site as of July 2013 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.