CL30, en-route, north west of Moscow Russia, 2010

CL30, en-route, north west of Moscow Russia, 2010

Summary

On 23 December 2010 an aircraft climbing out of Moscow in night IMC experienced a sudden in-flight pitch upset in which the three unrestrained passengers were injured, one seriously, as a result of an inappropriate pilot response to an annunciation of autopilot stabiliser trim malfunction. Despite extensive inspection, no root cause of this malfunction, which had been transitory, could be found. Crew QRH guidance in respect of the fault experienced was found to be unhelpful and crew knowledge of pitch trim - which could have eliminated any pitch disturbance - was deficient.

Description

On 23 December 2010, a Bombardier BD–100–1A10 Challenger 300 being operated on a business charter flight from Moscow Sheremetyevo to St. Petersburg experienced a sudden in-flight pitch upset during the climb in night Instrument Meteorological Conditions (IMC) and as a result the three passengers were injured, one seriously, and some of the cabin interior was damaged. After an assessment of the need for medical assistance for the passengers, the aircraft was returned to Moscow and two of the injured passengers were taken to hospital.

Investigation

After advising the Interstate Aviation Committee responsible for aviation accident investigation in Russia as the State of Occurrence, an Investigation was carried out by the Finnish SIB on behalf of the State of the Operator. It was noted that “the investigation was hindered by the fact that the (two hour) CVR recording had been overwritten".

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