What happened
The aircraft, registered as CCCP-L99, departed Urda on a scheduled flight to Kolobovka. It was part of a formation of three similar airplanes. During the journey, weather conditions deteriorated significantly, with visibility reduced by fog. While the two other aircraft in the group returned to the departure aerodrome, the pilot of the CCCP-L99 elected to continue toward the destination. Unable to maintain visual reference or follow the prescribed route, the pilot became lost and deviated from the planned path. The airplane eventually crashed into a dense wooded area. Search efforts located the wreckage six days later on October 29. The pilot was killed in the accident.
Findings
Investigations concluded that the primary factor was a lack of operational discipline by the crew. Specifically, when encountering foggy conditions, the pilot failed to return to the departure aerodrome or make a decision to land at an available airfield. Instead, the pilot attempted to fly over the weather phenomenon to reach the destination, leading to the loss of control and subsequent impact.