Background
The pilot received a weather briefing that included an AIRMET indicating occasional moderate rime ice or mixed icing in clouds in precipitation between 9,000 and 20,000 feet. The aircraft was not equipped with anti-ice or deice equipment. It departed Provo at approximately 1544.
Sequence of Events
At 1607, the pilot radioed that he was picking up ice. At 1647, he stated that he wanted to deviate due to weather. At 1657 and again at 1702, he reported that he was picking up ice. Following the 1702 call, the controller recommended a course reversal, to which the pilot responded, "we're doing that."
Weather Conditions
The freezing level was near 8,000 feet, and the temperature/dew point spread between 8,000 and 13,000 feet was approximately 1 degree Celsius. The aircraft's radar track, combined with satellite imagery of cloud activity near the time of the accident, showed the aircraft penetrating the core of a convective buildup just prior to the accident.
Impact
The aircraft impacted the ground upright in a nose low, wings level attitude.