On 2 April 2012, the crew of a UT Air ATR72 which had just taken off from Tyumen lost control of the aircraft and it crashed and caught fire killing or seriously injuring all occupants. The subsequent Investigation attributed the accident to the decision of the aircraft commander to take off without prior ground de icing when frozen deposits had accumulated on the airframe. However, a wide ranging systemic context for this was found, including ineffective regulatory requirements and a dysfunctional SMS at UT Air.