Minot-Intl

After deplaning passengers at Thief River Falls after an air taxi flight, the pilot was reportedly anxious to return to his base in Minot to prepare for another trip the following day, and left for the return trip within a few minutes after his arrival at Thief River Falls. There was no record of a weather briefing. Observations of Doppler radar by the University of North Dakota, and a Safety Board meteorological study, show that the airplane had penetrated a thunderstorm when control was lost. The airplane had encountered the center of a microburst, and was located directly under the downdraft.

The public use flight was being operated by the Indian Health Service of the U.S. Department of Health & Human Services. It departed VFR from Devils Lake, North Dakota, with an intended destination of Rolla, North Dakota. The pilot attempted two visual approaches at Rolla, but encountered whiteout conditions due to a snow storm. He obtained an IFR clearance and diverted to Minot. He flew two ILS approaches to runway 31 at Minot and reported a missed approach after each. Radio contact was lost after the second approach. About an hour later, a snow plow operator found wreckage on the airport. Investigation revealed the plane had impacted to the right of runway 31 with the gear retracted and the flaps extended 15°. The 0959 weather was in part: 600 feet obscured, visibility 1/2 mile variable in snow, wind 110° at 11 knots. No preimpact mechanical anomaly was found with the airplane or engines. All four occupants were killed.