On 31 October 1958, it was transferred to the Frunze aviation detachment of the Kyrgyz Civil Air Fleet.

It was piloted by a crew from the 250th flight detachment, consisting of commander (KVS) Andrey Ivanovich Fateev, co-pilot Anatoly Stepanovich Shevchenko, navigator Yuri Mikhailovich Kurlaev, flight engineer Grigory Tikhonovich Shalygin, and radio operator Ivan Ivanovich Pleskanev.

However, the crew violated the rules and turned right towards the mountain range, starting to gain altitude while flying along the left edge of the route.

[2] According to the commission investigating the incident, the cause of the crash was the crew commander's violation of visual flight rules.

During the investigation, it was found that in the Frunze aviation detachment, crews regularly violated flight rules.