What happened
During a mission focused on the evaluation of various onboard systems, likely involving military technology, an aircraft crashed into a mountainous region. The flight was being conducted under challenging meteorological conditions characterized by poor weather. During the initial climb phase following departure, the aircraft drifted from its intended flight path and struck a line of trees before impacting the ground in a hilly area.
The wreckage of the plane remained undiscovered for approximately one week, eventually being located amidst snow-covered terrain. The accident resulted in nine fatalities, with no survivors reported among the crew members on board.
Findings
Official details regarding the specific mechanics of the crash remain unavailable to the public. Because the mission involved highly sensitive and classified equipment, the Soviet authorities implemented immediate restrictions on all related data. Consequently, the precise contributing factors or the specific reason for the deviation from the departure course have not been released.