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Flight crew inadvertently started takeoff with the wrong wing flap setting resulting in an aborted takeoff.
| Attributes | |
| ACN | 211335 |
| Time | |
| Date | 199205 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : pit |
| State Reference | PA |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : takeoff other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time type : 500 |
| ASRS Report | 211335 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 12000 flight time type : 1300 |
| ASRS Report | 211333 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : rejected takeoff |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
Flight crew rejected the takeoff immediately after applying power due to a takeoff warning horn sounding. Horn sounded due to 1 degree takeoff flap being selected instead of 5 degree standard flap setting for takeoff on the medium large transport aircraft is 1 degree min versus 5 degree min for the medium large transport 4 aircraft. Even an experienced crew can make this mistake while consciously completing the checklist. There are no placards in the cockpit dictating 5 degree flap min for the medium large transport 4 aircraft and the checklist is the same for both versions of the aircraft. It is easy to forget what aircraft you are in since the medium large transport 3 and medium large transport 4 are intermixed in the daily flying schedule and aircrew routinely fly both models in the same day.
Original NASA ASRS Text
Title: FLC INADVERTENTLY STARTED TKOF WITH THE WRONG WING FLAP SETTING RESULTING IN AN ABORTED TKOF.
Narrative: FLC REJECTED THE TKOF IMMEDIATELY AFTER APPLYING PWR DUE TO A TKOF WARNING HORN SOUNDING. HORN SOUNDED DUE TO 1 DEG TKOF FLAP BEING SELECTED INSTEAD OF 5 DEG STANDARD FLAP SETTING FOR TKOF ON THE MLG ACFT IS 1 DEG MIN VERSUS 5 DEG MIN FOR THE MLG 4 ACFT. EVEN AN EXPERIENCED CREW CAN MAKE THIS MISTAKE WHILE CONSCIOUSLY COMPLETING THE CHKLIST. THERE ARE NO PLACARDS IN THE COCKPIT DICTATING 5 DEG FLAP MIN FOR THE MLG 4 ACFT AND THE CHKLIST IS THE SAME FOR BOTH VERSIONS OF THE ACFT. IT IS EASY TO FORGET WHAT ACFT YOU ARE IN SINCE THE MLG 3 AND MLG 4 ARE INTERMIXED IN THE DAILY FLYING SCHEDULE AND AIRCREW ROUTINELY FLY BOTH MODELS IN THE SAME DAY.
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.