Tu-124 was withdrawn from regular passenger service in the USSR, but was still used by the Soviet military. The design and placement of the switch to release the flaps was changed to prevent accidental activation of the flaps. References Aviation accidents and incidents in 1979 Aviation accidents and incidents in the Soviet Union 5484 1979 in the Soviet Union Accidents and incidents involving the Tupolev Tu-124 August 1979 events in Europe Airliner accidents and incidents with an unknown cause Airliner accidents and incidents caused by design or manufacturing errors Airliner accidents and incidents caused by instrument failure Transport in Tambov Oblast