What happened
While operating on a mission to perform aerial photography for the UAZ factory, an aircraft was approaching Ulyanost at an altitude of approximately 3,000 meters. During this approach phase, the left wing experienced a structural failure, resulting in the wing partially detaching from the fuselage and impacting the tail section of the plane.
Following this impact, the aircraft lost stability and entered an uncontrolled descent. The plane struck the ground in a snow-covered field situated roughly 15 km northeast of Ulyanovsk. The impact resulted in the total destruction of the aircraft and caused four fatalities among the crew members on board.
Findings
Investigations into the accident determined that the primary factor was a partial structural failure of the left wing, though the specific reason for this mechanical failure remains undetermined.