Date & Time: Oct 2, 2010 at 1024 LT
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Aircraft left Lensk at 0813LT on a flight to Bratsk. While cruising at 4,200 metres, the engine failed. Crew elected to divert to Kirensk but eventually made an emergency landing in a wooded area. All nine occupants were injured as the aircraft was damaged beyond repair.
Engine failure due to the damage of the bearings of the planetary gear from the first stage, leading to vibration and destruction of the turbine. It is possible the damage to the bearings was caused by the presence of aluminium or silicon oxide. However, it was not possible to determinate the source of this contamination.