7 fatalities

Severe Turbulence Causes In-Flight Breakup of Flight SU005, Killing Seven (CCCP-L1359)

Komarovo, RussiaFlight

On September 15, 1955, an Ilyushin II-12 (registration CCCP-L1359) operated by Aeroflot - Russian International Airlines was involved in an aviation accident near Komarovo, Russia in flight. 7 people were killed. Investigators recorded the probable cause as: Loss of control due to severe turbulence exceeding design limits of certain aircraft parts; contributing factors: poor flight preparation by the operator, failure to consider weather deterioration, and inadequate crew briefing about weather before departure… This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 3 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Source recordUpdated 2026-07-04Data APIEditorial standards

Flight SU005, en route from Moscow to Khabarovsk with stops, encountered severe turbulence at 3,000 meters, leading to loss of control and in-flight disintegration. All seven occupants were killed.

Incident Details

On an unspecified date, flight SU005 was conducting a scheduled passenger and cargo service from Moscow to Khabarovsk, with intermediate stops at Krasnoyarsk and Irkutsk. The aircraft carried three passengers, a crew of four, and various goods with a total weight of 417 kilograms. While cruising at an altitude of 3,000 meters, weather conditions deteriorated and the crew encountered thunderstorm activity. Severe turbulence caused the aircraft to lose control and enter a dive. Between 500 and 1,000 meters altitude, the airplane disintegrated in mid-air. Debris scattered across a field and wooded area near Komarovo, approximately 37 kilometers south-southwest of Kansk. All seven occupants were killed.

Investigation Findings

The official investigation determined that the loss of control was a direct consequence of severe turbulence that exceeded the design limits of certain parts of the aircraft. Contributing factors included poor flight preparation by the operator and a failure to consider the possibility of deteriorating weather conditions. Additionally, the crew had not been properly briefed about weather conditions prior to departure from Krasnoyarsk Airport.

Probable cause

Loss of control due to severe turbulence exceeding design limits of certain aircraft parts; contributing factors: poor flight preparation by the operator, failure to consider weather deterioration, and inadequate crew briefing about weather before departure from Krasnoyarsk.

Frequently asked questions

What happened in the 15 Sept 1955 Ilyushin II-12 accident near Komarovo, Russia?

Flight SU005, en route from Moscow to Khabarovsk with stops, encountered severe turbulence at 3,000 meters, leading to loss of control and in-flight disintegration. All seven occupants were killed.

Were there any fatalities in the 15 Sept 1955 Ilyushin II-12 accident?

The accident was fatal, resulting in 7 fatalities.

What aircraft was involved and where did it happen?

The accident on 15 Sept 1955 involved an Ilyushin II-12, registration CCCP-L1359, operated by Aeroflot - Russian International Airlines, at Komarovo, Russia.

What was the probable cause of the accident?

Loss of control due to severe turbulence exceeding design limits of certain aircraft parts; contributing factors: poor flight preparation by the operator, failure to consider weather deterioration, and inadequate crew briefing about weather before departure from Krasnoyarsk.