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B747 flight crew and load planner reported the dispatch software system crashed which prevented the final weight and balance numbers to be delivered prior to takeoff. During cruise; the flight crew was notified their max taxi weight was exceeded and max takeoff weight of 875;000 pounds was exceeded at 876;686 pounds.
| Attributes | |
| ACN | 1303795 |
| Time | |
| Date | 201510 |
| 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 | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Route In Use | Oceanic |
| Flight Plan | IFR |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 191 Flight Crew Total 16324 Flight Crew Type 12694 |
| Person 2 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 178 Flight Crew Total 7242 Flight Crew Type 3850 |
| Events | |
| Anomaly | Deviation - Procedural FAR Deviation - Procedural Published Material / Policy Deviation - Procedural Weight And Balance |
Narrative:
Flight was a charter flight. The flight taxied and took off twenty minutes later. Final weights were sent nearly an hour before taxi with a zero fuel weight (ZFW) of 525;586 pounds. One hour 17 minutes after takeoff; our dispatcher sent us an ACARS message informing us 'your final weights were wrong. Actual ZFW is 534;726. I sent a new reval doc to the printer. Sabre crashed when I sent it. Did it arrive? I plan on filing a report over this. Thanks.' we the crew started doing our calculations with the new ZFW (that was 9140 pounds over the final ZFW message of 526586) and added it to our boarded fuel 344;100 pounds and concluded that we taxied out at 878;826 pounds (max weight is 878;000 pounds) without knowing it. The liftoff fuel from the ACARS howgoesit message was 342;100 pounds and we concluded (after we were notified of the error) that we lifted off at 876;686 pounds (max takeoff is 875;000 pounds) without our knowledge. We assumed we weighted 867;686 pounds using the original final weight. Our v-speeds were calculated based on that weight. The aircraft takeoff roll and rotation was uneventful but felt heavy. From push back; during taxi and until takeoff our cockpit was not contacted thru ACARS; satcom; or tower or any other means to inform us of the error. Inflight we called the duty manager thru satcom to inform him of our findings.
Original NASA ASRS Text
Title: B747 flight crew and Load Planner reported the Dispatch software system crashed which prevented the final weight and balance numbers to be delivered prior to takeoff. During cruise; the flight crew was notified their max taxi weight was exceeded and max takeoff weight of 875;000 LBS was exceeded at 876;686 LBS.
Narrative: Flight was a charter flight. The flight taxied and took off twenty minutes later. Final weights were sent nearly an hour before taxi with a Zero Fuel Weight (ZFW) of 525;586 LBS. One hour 17 minutes after takeoff; our Dispatcher sent us an ACARS message informing us 'YOUR FINAL WEIGHTS WERE WRONG. ACTUAL ZFW IS 534;726. I SENT A NEW REVAL DOC TO THE PRINTER. SABRE CRASHED WHEN I SENT IT. DID IT ARRIVE? I PLAN ON FILING A REPORT OVER THIS. THANKS.' We the crew started doing our calculations with the new ZFW (that was 9140 LBS over the final ZFW message of 526586) and added it to our boarded fuel 344;100 LBS and concluded that we taxied out at 878;826 LBS (max weight is 878;000 LBS) without knowing it. The liftoff fuel from the ACARS HOWGOESIT message was 342;100 LBS and we concluded (after we were notified of the error) that we lifted off at 876;686 LBS (max takeoff is 875;000 LBS) without our knowledge. We assumed we weighted 867;686 LBS using the original final weight. Our V-speeds were calculated based on that weight. The aircraft takeoff roll and rotation was uneventful but felt heavy. From push back; during taxi and until takeoff our cockpit was not contacted thru ACARS; SATCOM; or TOWER or any other means to inform us of the error. Inflight we called the duty manager thru SATCOM to inform him of our findings.
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.