An accident investigation was launched by the
Interstate Aviation Committee (IAC) of Russia. Two days after the crash on 3 September, the IAC reported that the
flight recorders had been recovered from the aircraft, the data were retrieved successfully and would be analyzed. The committee completed examination of the accident site and was making preparations for moving the aircraft. The United States
National Transportation Safety Board, representing the State of Design and State of Manufacture of the aircraft, and the United Kingdom's
Air Accidents Investigation Branch, representing the State of Registry, were invited to participate in the investigation. The
Investigative Committee of Russia also launched a probe into the crash, with a Southern Transport Department official stating that "a criminal investigation has been opened into the emergency landing ... on suspicion of inadequate services with a risk to clients' health." The IAC released a preliminary report on 6 November 2018. On 12 December 2019, the IAC released their final report on the accident. The cause of the accident was the flight crew ignoring repetitive windshear warnings when the aircraft experienced low-level horizontal windshear and the crew's decision to land on the runway when its conditions at the time of the accident prohibited doing so. Contributing factors included violation of standard operation procedures, improper use of the autopilot, poor crew resource management training, and late deployment of the spoilers. == See also ==