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A B747 burned more fuel than it should have according to the flight plan. Dispatch discovered that an additional 15;600 pounds of cargo was loaded prior to departure and not accounted for in the weight and balance.
| Attributes | |
| ACN | 984094 |
| Time | |
| Date | 201111 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZBAA.Airport |
| State Reference | FO |
| Aircraft 1 | |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Person 1 | |
| Function | Captain Pilot Flying Check Pilot |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Procedural Weight And Balance |
Narrative:
Enroute we reported to dispatch that we had an over burn of approximately 5.4 and asked that this be reported to the sabre folks. Response back was: 'looks like the fuel issue is the ZFW increased to 526;935 and you should have been issued a new flight plan.' I'm not sure why that got missed but it explains the over burn. The new ZFW meant that our actual weight on takeoff was 15;600 pounds greater than what we had used to compute takeoff data; and the rest of the flight. Our 'final' weights showed a decrease of 1.1 from the flight plan which we used to get the final takeoff data. After receiving the corrected ZFW; we entered that into the FMC to provide proper fuel burn and speed calculations from that point forward (last 45 minutes of flight). No other issues from our perspective. It appears to me to be a station issue more than a dispatch issue although a new flight plan would have been good earlier.
Original NASA ASRS Text
Title: A B747 burned more fuel than it should have according to the flight plan. Dispatch discovered that an additional 15;600 LBS of cargo was loaded prior to departure and not accounted for in the weight and balance.
Narrative: Enroute we reported to Dispatch that we had an over burn of approximately 5.4 and asked that this be reported to the Sabre folks. Response back was: 'Looks like the fuel issue is the ZFW increased to 526;935 and you should have been issued a new Flight Plan.' I'm not sure why that got missed but it explains the over burn. The new ZFW meant that our actual weight on takeoff was 15;600 LBS greater than what we had used to compute takeoff data; and the rest of the flight. Our 'final' weights showed a DECREASE of 1.1 from the flight plan which we used to get the final takeoff data. After receiving the corrected ZFW; we entered that into the FMC to provide proper fuel burn and speed calculations from that point forward (last 45 minutes of flight). No other issues from our perspective. It appears to me to be a station issue more than a Dispatch issue although a new flight plan would have been good earlier.
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.