Accident Overview
On the second leg of a flight from Vitim to Olyokminsk, a single-engine airplane departed Lensk Airport at 0909 local time. About an hour into the flight, while cruising at an altitude of 1,500 meters, the engine began to vibrate. The flight crew decided to attempt an emergency landing.
Event Details
The airplane descended into a wooded area located 122 kilometers northwest of Olyokminsk. Upon impact with trees, the aircraft crashed and burst into flames. The fire subsequently destroyed the airplane.
Occupants and Damage
All nine occupants on board escaped the accident without injury. However, the aircraft was completely destroyed by the post-crash fire.
Probable Cause
The official investigation determined that the engine failure was the consequence of the disintegration of the 4th cylinder intake valve.