Accident
After departing from Ust-Nem Airport, the aircraft climbed to an approximate altitude of 30 meters when the left engine ceased operation and its propeller automatically feathered. The flight crew then retracted the flaps, leading the aircraft to roll to the left and assume a high angle of attack. It subsequently collided with trees and impacted terrain in a wooded area located 500 meters from the runway, erupting in flames. One passenger sustained injuries, and the other 15 occupants on board were killed.
Probable Cause
Investigators determined that the left engine failed during the initial climb because wet snow had entered the air intake. The takeoff had been performed from a runway covered with slush and wet snow. This condition was identified as the probable cause of the accident.
Contributing Factors
Several factors were noted as contributing to the accident: the crew retracted the flaps prematurely; the crew lacked adequate training on this specific aircraft type; and there was insufficient distance from the ground to allow for recovery from the abnormal flight attitude.