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3 fatalities

Aircraft Crash Near Sverdlovsk-Koltsovo Airport Due to Icing and Loss of Control (CCCP-L4704)

Sverdlovsk, RussiaTakeoff (climb)

On December 30, 1949, a Lisunov LI-2 (registration CCCP-L4704) operated by Aeroflot - Russian International Airlines was involved in an aviation accident near Sverdlovsk, Russia during takeoff. 3 people were killed. Investigators recorded the probable cause as: The loss of control was the result of a series of mistakes on behalf of the crew who adopted poor flight techniques after departure. At the time of the accident, weather was marginal with severe 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 2026-08-05Data APIEditorial standards

A few minutes after takeoff from Sverdlovsk-Koltsovo Airport, an aircraft encountered severe icing, leading to a loss of control and a crash in a field. Three people were killed and three were injured.

Incident Overview A few minutes after departing from Sverdlovsk-Koltsovo Airport, the aircraft was climbing when the crew encountered severe icing conditions. Ice covered the windshield, and the pilot in command lost control of the aircraft. The aircraft banked to the right and crashed right wing first into a field located 8.5 km southeast of the airport, near the Iset River. Three people, including two crew members and one passenger, were killed, while three other occupants were injured. ## Contributing Factors The official investigation identified the loss of control as the result of a series of mistakes by the crew, who adopted poor flight techniques after departure. The weather at the time was marginal, with severe icing conditions. The crew's inexperience, particularly that of the copilot, was noted as a contributing factor. Additionally, the inefficiency of the windshield deicing system and a lack of crew training were also considered contributing factors.

Probable cause

The loss of control was the result of a series of mistakes on behalf of the crew who adopted poor flight techniques after departure. At the time of the accident, weather was marginal with severe icing conditions. It was stated that the crew was inexperienced, especially the copilot, which remains a contributing factor. The inefficiency of the windshield deicing system and a lack of crew training were also considered as contributing factors.
Icing

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