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B777 captain reported receiving closeout weights that were 27;000 lbs under the actual weight.
| Attributes | |
| ACN | 1411123 |
| Time | |
| Date | 201612 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Flight Phase | Parked |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Procedural Weight And Balance Deviation - Procedural Published Material / Policy |
Narrative:
The original [performance data] showed a empty operating weight (eow) of 388102; with a planned to weight of 633.7. However the closeout showed a eow of 361314 and a to weight of 602.7; 27;000 lbs difference. A huge difference in weight and a large reduction in to thrust etc. If the wrong weight was used for takeoff. This could lead to a serious error and potentially a catastrophic event if the wrong thrust had been used. We delayed our taxi with engines shut down on the ramp; until finally load control and engineering resolved the eow weight error. This error may be happening on many aircraft across the fleet! The eow should not change at all day to day....and this error is troubling! Kudos to first officer for noting the weight error and we then took the time to find an answer before continuing to taxi for takeoff. The flight continued after a 75 min delay. We were told that the error was resolved but did not understand if this was just one aircraft or possibly a computer of procedure error that might affect other flights/ fleets.
Original NASA ASRS Text
Title: B777 Captain reported receiving closeout weights that were 27;000 lbs under the actual weight.
Narrative: The original [performance data] showed a Empty Operating Weight (EOW) of 388102; with a planned TO weight of 633.7. However the closeout showed a EOW of 361314 and a TO weight of 602.7; 27;000 lbs difference. A HUGE difference in weight and a large reduction in TO thrust etc. if the wrong weight was used for takeoff. This could lead to a serious error and potentially a catastrophic event if the wrong thrust had been used. We delayed our taxi with engines shut down on the ramp; until finally Load Control and Engineering resolved the EOW weight error. This error may be happening on many aircraft across the fleet! The EOW should not change at all day to day....and this error is troubling! Kudos to First Officer for noting the weight error and we then took the time to find an answer before continuing to taxi for takeoff. The flight continued after a 75 min delay. We were told that the error was resolved but did NOT understand if this was just one aircraft or possibly a computer of procedure error that might affect other flights/ fleets.
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.