The Interstate Aviation Committee (IAC or MAK), the Russian Accident Commission, determined that the crash was caused by the crew failing to comply with night flight rules.

On July 17, Siberian Light Aviation Flight 42, an Antonov-28 with 2 pilots and 15 passengers, suffered a dual engine failure and crash landed in a remote area in the Vasyugan Swamp in southwestern Siberia.

In thick fog, the plane collided with trees on a cliff next to the Kirenga River, about 2.5 mi (4.0 km) southwest of the runway.

Kazatjinskoje Airport lacked sophisticated radar systems and the ability for aircraft to make instrumental landings (ILS).

In the report released by the Russian Interstate Aviation Committee (MAK) it was established that the probable cause of the accident was the pilots' failure to comply with night flight rules.