30 fatalities

Soviet Aircraft Collision with Mount Kushtang in 1960 (CCCP-91577)

Boysun, UzbekistanFlight

On December 13, 1959, an Ilyushin II-14 (registration CCCP-91577) operated by Aeroflot - Russian International Airlines was involved in an aviation accident near Boysun, Uzbekistan in flight. 30 people were killed. Investigators recorded the probable cause as: The accident resulted from multiple navigation errors by the flying crew, who decided to cut the route, apparently to save time. 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

A Soviet aircraft struck Mount Kushtang in 1960 while flying under VFR in IMC conditions. The 30 occupants were not found until June 1960, when alpinists discovered the wreckage at 3,501 meters.

Incident Overview and Search Operations On 19 January 1960, Soviet authorities officially announced an aviation accident involving an aircraft that had lost contact while cruising at 3,600 meters. At 0927 local time, the radio operator informed air traffic control that the aircraft was operating under visual flight rules (VFR) and had sighted Derbent. One minute later, while in clouds, the aircraft struck the southeast slope of Mount Kushtang, located approximately 27 kilometers northeast of Boysun. Search and rescue operations were initiated but suspended a few days later after no trace of the aircraft or its 30 occupants was found. All operations were abandoned one month after the incident. On 2 June 1960, alpinists discovered the wreckage in a rocky and craggy area at an altitude of 3,501 meters. The passenger manifest included two Chinese nationals, three German nationals, and the remainder were Soviet soldiers and their family members.

Probable cause

The accident resulted from multiple navigation errors by the flying crew, who decided to cut the route, apparently to save time. The captain continued under VFR in instrument meteorological conditions (IMC), and the aircraft was 40 to 50 kilometers off course to the right of the intended route. The mountain was shrouded in clouds, making it indistinguishable, and the crew failed to account for the wind component, which was a contributing factor.