into the crash Russian authorities dispatched investigators to the site of the emergency landing, classifying the investigation as a "criminal probe", according to the Russian Investigative Committee. Prosecutor General
Yury Chaika was said to be "keeping a watchful eye" over the proceedings. The
Interstate Aviation Committee (MAK) said that it had begun analysis of both recovered devices, which were said to be in "satisfactory condition". The third recorder, the
cockpit voice recorder, was recovered on 10 December. Analysis of the flight data recorder showed that eight minutes after the aircraft took off, at an altitude of , the fuel supply to the engines fluctuated, and as the aircraft passed , the outer two engines shut down. On 1 April 2011, investigators announced that poor fuel quality had been ruled out as a cause of the crash, despite instrument readings that indicated issues with the fuel supply before the aircraft crashed. On 26 September 2011, the MAK released its report concluding that the cause of the accident was the erroneous actions of the crew during the flight and approach in instrumental meteorological conditions with one engine running (out of three), which resulted in the aircraft approaching significantly to the right of the extended centre line, exiting the runway after landing and colliding with an embankment. The flight engineer accidentally shut off a fuel pump while transferring fuel. On 22 January 2015, the airplane's pilot Zakarzha Zakarzhayev was found guilty in court under article 263.3 of the
Criminal Code of Russia (violating safety rules of transportation and air travel, which led by neglect to death of two or more people). He was given a
suspended sentence of 3 years and then immediately
amnestied. ==References==