Report on serious incident at Bergen Airport 9 November 2007 with ATR-42-300, OY-JRY
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During the take off run from Bergen Airport Flesland the airplane lifted off prematurely without any control input had been given from the flight crew. The airplane continued on an uncontrolled climb despite both control columns being moved to the forward stops and additional engine power had been added. The stick shaker activated and the "cricket" sound was heard for some seconds at the same time as the airspeed decreased.
Eventually the airplane nose started to lower and the airspeed gradually increased, after which the stick shaker ceased. The flight crew got control over the situation and continued on the flight to Florø. After landing at Florø Airport the flight controls and control surfaces was inspected without anything abnormal was found.
In the opinion of the Accident Investigation Board this serious incident was the result of ice contamination on the horizontal tail surfaces even if the airplane had been deiced just prior to departure.
Eventually the airplane nose started to lower and the airspeed gradually increased, after which the stick shaker ceased. The flight crew got control over the situation and continued on the flight to Florø. After landing at Florø Airport the flight controls and control surfaces was inspected without anything abnormal was found.
In the opinion of the Accident Investigation Board this serious incident was the result of ice contamination on the horizontal tail surfaces even if the airplane had been deiced just prior to departure.
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