25 ноября  Ан-2 RA 33589

     The Interstate Aviation Committee Investigation team has completed the investigation of the accident with An-2 RA-33589 aircraft (private owned) occurred in Khanty-Mansiisk Autonomous District (RF) on November 25, 2012.
     Most probably the accident with  and An-2 RA-33589 aircraft was caused by aircraft beyond stall angle of attack entry during dynamic turn for emergency landing with reverse runway heading due to engine failure after take-off at low-altitude followed by shaking and its power loss resulted in aircraft ground impact with bank angle more than 60°.
     Engine failure was caused by high-temperature damage and destruction of cylinder-piston group details due to it inadequate technical operation and using motor gasoline in aircraft fuel flow system which quality didn't comply with requirements for preferred AI-95 gasoline in accordance with aeronautical equipment flight service evaluation program, Order of Ministry of Transport of the Russian Federation № НА-131-р from April 11, 2001 and engineering solution № АБ-1236-2003 from May 22, 2003.
     Most probably the contributing factor was partial skill loss of An-2 aircraft control by aircraft pilot in command (PIC). Flight operation was performed by PIC, meteorological minimas and which authorizations written in Private-Pilot License and the fact of medical flight-expert commission procedure were not documented.  
     PIC's decision to perform straight-ahead landing most probably didn't allow to reduce the severity of accident consequences. 
    The appropriate safety recommendations based on the investigation results were developed.