Unexplained Wing Drop During Initial Climb Leads to Crash Landing in Snow-Covered Field (CCCP-87911)

Accident Overview and Sequence of Events The aircraft completed a normal takeoff roll and initiated rotation at a speed of 178 km/h. During the initial climb phase, the right wing dropped to an angle of 30°. The flight crew attempted to correct the attitude using the ailerons, but the aircraft continued to descend. It subsequently struck a 1.5-meter-high snow wall and crash-landed in a snow-covered field. The impact caused the aircraft to lose its undercarriage before it came to rest. The aircraft was damaged beyond repair. All 12 passengers escaped uninjured, while five crew members sustained minor injuries. The official investigation was unable to establish or identify the exact cause of the accident or the reason for the right wing drop. The investigation confirmed that the takeoff speed was correct.