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An air carrier B737 flight crew departed with the wrong weight for their takeoff data computations and they used the speeds that were calculated on a weight much lighter than actual.
| Attributes | |
| ACN | 387838 |
| Time | |
| Date | 199712 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sea |
| State Reference | WA |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : preflight |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 3700 flight time type : 150 |
| ASRS Report | 387838 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | other other other : other pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 14000 flight time type : 2500 |
| ASRS Report | 388932 |
| Events | |
| Anomaly | non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Last day of a 3-DAY trip. First officer with 150 hours in type and captain with approximately 15000 hours total time and 2000 hours in type. I had completed all my predep duties, including setting up approximately takeoff speeds and appropriate weight card from preliminary company information. When manifest finally showed up, captain reviewed and noticed fuel was off by 800 pounds. Sent paperwork back for correction. When paperwork came back, captain barked '88' meaning 88000 pounds speed card. I said '88?' he said 'yep.' I had put the 100000 pounds card up initially from given preliminary information. We took off from runway 16L and just after liftoff and prior to wheels up, the stick shaker sounded for approximately 1/4 - 1/2 second. Everything after that was normal.
Original NASA ASRS Text
Title: AN ACR B737 FLC DEPARTED WITH THE WRONG WT FOR THEIR TKOF DATA COMPUTATIONS AND THEY USED THE SPDS THAT WERE CALCULATED ON A WT MUCH LIGHTER THAN ACTUAL.
Narrative: LAST DAY OF A 3-DAY TRIP. FO WITH 150 HRS IN TYPE AND CAPT WITH APPROX 15000 HRS TOTAL TIME AND 2000 HRS IN TYPE. I HAD COMPLETED ALL MY PREDEP DUTIES, INCLUDING SETTING UP APPROX TKOF SPDS AND APPROPRIATE WT CARD FROM PRELIMINARY COMPANY INFO. WHEN MANIFEST FINALLY SHOWED UP, CAPT REVIEWED AND NOTICED FUEL WAS OFF BY 800 LBS. SENT PAPERWORK BACK FOR CORRECTION. WHEN PAPERWORK CAME BACK, CAPT BARKED '88' MEANING 88000 LBS SPD CARD. I SAID '88?' HE SAID 'YEP.' I HAD PUT THE 100000 LBS CARD UP INITIALLY FROM GIVEN PRELIMINARY INFO. WE TOOK OFF FROM RWY 16L AND JUST AFTER LIFTOFF AND PRIOR TO WHEELS UP, THE STICK SHAKER SOUNDED FOR APPROX 1/4 - 1/2 SECOND. EVERYTHING AFTER THAT WAS NORMAL.
Data retrieved from NASA's ASRS site as of July 2007 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.