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A B-757 first officer mistakenly typed in the zero fuel weight where he should have typed takeoff weight and requested takeoff numbers for that lower weight. On takeoff; when the first officer called 100 knots; the captain realized the numbers were wrong and delayed rotation until further down the runway.
| Attributes | |
| ACN | 1271441 |
| Time | |
| Date | 201506 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZZ.Airport |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 130 Flight Crew Total 5982 Flight Crew Type 988 |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy Deviation - Procedural Weight And Balance Deviation - Speed All Types Flight Deck / Cabin / Aircraft Event Other / Unknown |
Narrative:
I used the flight planned estimated tow to print up a preliminary runway data sheet. Then; when the real numbers were uploaded from load planning I mistakenly typed in the zero fuel weight where I should have typed tow and requested numbers for a departure. We set the bad numbers in our speed bugs and took off with the wrong speed and weight. Tow was around 252k; zero fuel weight was around 177k. The captain realized the speeds were wrong after I called out '100 kts' and accelerated down the runway a bit until the airplane climbed out. We were beyond V1 as bugged; but probably below the real V1 (but we didn't know what that number was).
Original NASA ASRS Text
Title: A B-757 First Officer mistakenly typed in the zero fuel weight where he should have typed takeoff weight and requested takeoff numbers for that lower weight. On takeoff; when the First Officer called 100 knots; the Captain realized the numbers were wrong and delayed rotation until further down the runway.
Narrative: I used the flight planned estimated TOW to print up a preliminary runway data sheet. Then; when the real numbers were uploaded from load planning I mistakenly typed in the zero fuel weight where I should have typed TOW and requested numbers for a departure. We set the bad numbers in our speed bugs and took off with the wrong speed and weight. TOW was around 252k; zero fuel weight was around 177k. The captain realized the speeds were wrong after I called out '100 kts' and accelerated down the runway a bit until the airplane climbed out. We were beyond V1 as bugged; but probably below the real V1 (but we didn't know what that number was).
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.