What happened
During a scheduled cargo and mail transport mission from Tomsk to Baturino, an aircraft experienced a critical mechanical failure. The flight was transporting 757 kg of mail along with 120 kg of various goods, accompanied by two crew members and one passenger responsible for the freight.
While cruising at an altitude of approximately 200 meters, roughly six minutes prior to its scheduled arrival in Baturino, the aircraft's engine ceased functioning. In response to the loss of power, the crew attempted an emergency landing. During this maneuver, the plane collided with trees and flipped over in a forested region situated 13 km from the destination. The accident resulted in one fatality (the captain) and two injuries among the remaining occupants.
Findings
Investigators were unable to identify the precise reason for the engine failure. However, evidence suggested that the malfunction may have been triggered by an excessive buildup of calamine on the intake valves.