On September 7, 1973, a Lisunov LI-2 (registration CCCP-48982) operated by Aeroflot - Russian International Airlines was involved in an aviation accident near Sovetsk, Russia in flight. 7 people were killed. Investigators recorded the probable cause as: The aircraft became uncontrollable after it encountered severe turbulences while cruising in thunderstorm activity. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 1 related events involving the same aircraft type or operator are linked below.
A ferry flight from Kotlas to Voronezh crashed northwest of Sovetsk after entering a dive. All seven occupants were killed. Investigators found the crew was not warned of thunderstorms due to a faulty weather radar.
Flight and Accident
An airplane operating a ferry flight from Kotlas to Voronezh crashed in an uninhabited area northwest of Sovetsk. The flight carried two passengers and a crew of five. The aircraft was cruising at an altitude of 1,500 meters from Kotlas to Kirov, after which the crew was cleared to climb to 1,800 meters. At 1056, the crew was instructed to fly heading 219°. Nine minutes later, the airplane entered a dive and subsequently crashed. The wreckage was discovered in the afternoon. The aircraft was destroyed by impact forces and a post-crash fire. All seven occupants were killed.
Investigation Findings
The investigation determined that the aircraft became uncontrollable after encountering severe turbulence while cruising in thunderstorm activity. Further inquiries revealed that the crew had not been informed about the possible presence of thunderstorms because the main weather radar of the local meteorologist was out of service due to maintenance.
Probable cause
The aircraft became uncontrollable after it encountered severe turbulences while cruising in thunderstorm activity. Investigations revealed that the crew has not been informed about the possible presence of thunderstorms as the main weather radar of the local meteorologist was out of service due to maintenance.
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