NTSB Reports: April 2017
At about 0937 Mountain time, the airplane was destroyed when it collided with mountainous terrain. The private pilot and three passengers were fatally injured. Instrument conditions prevailed.Radar data show the airplane reached its cruising altitude of approximately 8000 feet msl some 12 minutes after takeoff. The airplane subsequently descended about 1300 feet in one minute before entering a momentary climb, which was followed by a shallow descent. In the remaining two and a half minutes, the airplane maintained a 300 fpm descent rate, with some intermittent climbs. The final two radar targets show the airplane climbed about 425 feet in 12 seconds. The airplane maintained a straight track from its departure airport to the last radar target, which was within 0.1 nm of the 6670 feet msl accident site.