Incident Overview
A scheduled domestic cargo flight operating under 14 CFR Part 135 departed on a normal takeoff and climbed en route to Salt Lake City, Utah. Routine communications and radar flight following were established with Denver Air Route Traffic Control Center (ARTCC). Approximately 8 miles west of Fort Collins, Colorado, the aircraft suddenly disappeared from radar and voice contact with the pilot was lost.
Investigation Findings
The official investigation documented two occurrences:
Occurrence 1: Loss of Control – In Flight
- Phase of operation: Climb to cruise
- Light condition: Dark night
- Weather condition: Turbulence
- Reason for occurrence: Undetermined
Occurrence 2: In Flight Collision with Terrain/Water
- Phase of operation: Descent – uncontrolled
- Reason for occurrence: Undetermined
The investigation did not specify the aircraft type, registration, engine count, date, operator, number of occupants, injuries, or extent of damage beyond the loss of radar and communication.