38 fatalities

Aircraft Crash in Wooded Area After Engine Failure (CCCP-87437)

Sverdlovsk-Koltsovo, RussiaTakeoff (climb)

On October 7, 1978, a Yakovlev Yak-40 (registration CCCP-87437) operated by Aeroflot - Russian International Airlines was involved in an aviation accident near Sverdlovsk-Koltsovo, Russia during takeoff. 38 people were killed. Investigators recorded the probable cause as: The left engine failed slightly less than a minute after rotation due to icing. The crew failed to follow the pre-takeoff checklist and did not activate the engine deicing systems despite reported icing conditions. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-06-12Data APIEditorial standards

An aircraft crashed in a wooded area after the left engine failed shortly after takeoff in marginal weather. All 38 occupants were killed.

Incident Overview Less than a minute after liftoff, the aircraft's left engine failed while it was climbing in marginal weather conditions. The captain notified air traffic control of the situation and received clearance to return for an emergency landing. However, the aircraft was unable to gain sufficient altitude and struck trees at a speed of 210 km/h. The crash occurred in a wooded area on hilly terrain approximately 7.5 km from the airport. The aircraft was completely destroyed, and all 38 occupants were killed. ## Contributing Factors The official investigation determined that the left engine failure was caused by icing. The crew did not follow the pre-takeoff checklist and failed to activate the engine deicing systems, despite reports of icing conditions at altitude. During the climb, the left engine failed, and the remaining engines (number 2 and 3) did not provide sufficient power. Additionally, the aircraft's total weight was 419 kg above its maximum takeoff weight (MTOW). The speed at the time of the engine failure was insufficient, partly because the landing gear was not completely raised.

Probable cause

The left engine failed slightly less than a minute after rotation due to icing. The crew failed to follow the pre-takeoff checklist and did not activate the engine deicing systems despite reported icing conditions. The remaining engines did not provide sufficient power, and the aircraft was 419 kg above MTOW with insufficient speed due to the landing gear not being completely raised.