Rejected Take-off above V1
Air Berlin Boeing B737-800, Dortmund
Conditions and Environment
EDLW ATIS E 0550Z 02008KT 1000 R06/1800D SN OVC003 M04/M04 Q1016 06SNOCLO
- Early morning, reduced visibilities, moderate snowfall, quartering headwind.
- Aircraft de-/anti-iced.
- No known aircraft deficiencies.
- Experienced and fully qualified crew.
- Take-off on runway 06, length 2000 meters.
- Friction coefficients measured 10 minutes prior to departure between 62 and 71.
Incident/Accident
- When the first officer as Pilot Monitoring called V1 at 127 KIAS, the captain observed 120 KIAS on his side and saw an airspeed disagree indication
- The take-off was rejected, maximum speed 130 knots ground speed, equivalent to about 135 KIAS.
Outcome
- Overrun with approximately 27 KIAS and nose gear on soft ground.
- No aircraft damage or injuries; passengers disembarked via stairs.
- Tests by the German accident investigation board (BFU) were unable to find any anomalies in the pitot static system.
How can we identify unreliable airspeed as early as possible? Until when do we reject the take-off in a scenario like this, and what does “the book” say about it?
More Accidents and Incidents – Rejected take-offs above V1
The purpose of this short presentation is to focus on threats and challenges in RTO decision making. It is not the intention to judge the performance of the crew at any time or in any way.
Source and detailled information: Aviation Herald / German BFU.
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