Accident Details
The flight began with a normal takeoff roll. The crew initiated rotation at a speed of 220 km/h. Five seconds after liftoff, while climbing to an altitude of 10 meters, the left engine failed. The left propeller automatically feathered, and the crew continued the climb.
Thirty-four seconds after takeoff, the aircraft reached 30 meters altitude at a speed of 230 km/h, at which point the crew retracted the flaps. Six seconds later, at a height of 40 meters and a speed of 227 km/h, the pilot-in-command initiated a left turn. During the turn, the aircraft drifted to the left, lost speed, and stalled. It subsequently crashed in flames on a pipeline owned by the Neftyanyye Kamni Oil Company.
Two crew members and 54 passengers were killed, while eight other occupants were injured.
Probable Cause
The official investigation determined that several blades on the first stage of the turbine disintegrated due to a reduction in their mechanical properties caused by previous overheating, probably beyond 1,150 °C. However, it was not possible to establish the exact cause of the overheating or to define when this overheating occurred.