Aircraft Overrun After Snow Contamination During Takeoff (CCCP-87825)

Incident Overview and Sequence of Events The aircraft was cleared of snow before departure, but continuous snowfall re-covered the airframe between deicing and the start of the takeoff roll. In poor weather conditions, including snowfall and reduced visibility, the pilot-in-command initiated rotation. The aircraft lifted off and climbed for a few meters before the left wing dropped, causing the left main landing gear to strike the runway surface. The airplane returned to the runway, and the crew attempted an emergency braking procedure. The aircraft was unable to stop within the remaining runway distance and overran the end of the runway. The left wing then collided with the building of a meteorological post located 25 meters behind the runway threshold. All three crew members and 14 passengers escaped without injury. ## Official Findings The investigation determined that the aircraft was contaminated with snow during the takeoff procedure. It also found that the stabilizers were positioned at a -5.9° angle instead of the prescribed -3.9° setting.