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A B767 first officer failed to enter the aircraft's final takeoff weight in the FMC prior to takeoff. He noticed that aircraft's LNAV function was not engaged. Fatigue was an issue because of early morning departures.
| Attributes | |
| ACN | 837511 |
| Time | |
| Date | 200906 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Experience | Flight Crew Last 90 Days 180 Flight Crew Total 10000 Flight Crew Type 4000 |
| Events | |
| Anomaly | Deviation - Procedural Weight And Balance Deviation - Procedural Published Material / Policy |
Narrative:
Normal preflight; walk around; cockpit setup and briefing. Pushed back from gate. Normal engine start; control check and taxi to runway. Takeoff checklist was run while taxiing to runway. Took off with captain flying. Realized as captain called for gear up LNAV that we had taken off with out final weights. Final weights printed on ACARS approximately one minute later with just a minor change from planned weights. This was the 3rd morning out of the last 4 that I had awoken at XA00am for an early morning check-in and departure.
Original NASA ASRS Text
Title: A B767 First Officer failed to enter the aircraft's final takeoff weight in the FMC prior to takeoff. He noticed that aircraft's LNAV function was not engaged. Fatigue was an issue because of early morning departures.
Narrative: Normal preflight; walk around; cockpit setup and briefing. Pushed back from Gate. Normal engine start; control check and taxi to Runway. Takeoff checklist was run while taxiing to Runway. Took off with Captain flying. Realized as Captain called for gear up LNAV that we had taken off with out final weights. Final weights printed on ACARS approximately one minute later with just a minor change from planned weights. This was the 3rd morning out of the last 4 that I had awoken at XA00am for an early morning check-in and departure.
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.