Flight and Pilot Information
The pilot held a commercial certificate and was the sole occupant of the airplane. The flight was on an intermediate segment of a business-related cross-country journey.
Witness Observations
Some witnesses reported seeing the airplane following a highway over a 7,500-foot mountain pass at an altitude of approximately 300 feet above ground level (AGL). A snow storm was in progress, with visibility estimated at about 120 feet. Overcast ceilings were estimated at about 500 feet AGL. Additionally, an AIRMET for turbulence and icing conditions was in effect for the area of flight.
Other witnesses observed the airplane maneuvering over the highway, then executing a right turn and descending into the terrain.
Accident Sequence
Based on witness accounts, the airplane was flying low over the highway when it turned right and subsequently descended into the terrain. The accident occurred during adverse weather conditions including snow, low visibility, low ceilings, and forecast turbulence and icing.
Investigation Status
The investigation is ongoing. No further details regarding the aircraft type, registration, operator, date, time of day, or injuries have been released. The probable cause has not yet been determined.