The Russian Federal Service for Supervision of Transport (Rostransnadzor) stated that during its examination on the accident aircraft, the airline had violated the procedure for changing oil in the gearboxes, and the procedure for washing the air starter filter.
O Servizo Federal para a Supervisión do Transporte Ruso (Rostransnadzor) afirmou que durante a exploración do avión accidentado, a aeroliña violara o procedemento do cambio de aceite nas caixas de engrenaxes, e o procedemento para limpar os filtros de aire de arranque.