Overview
An aircraft collided with a ridge at an elevation of 12,400 feet during a flight conducted in dark visual meteorological conditions. The accident resulted in two fatalities.
Flight History
The flight departed at 0500 hours in dark visual meteorological conditions. Radar data showed the aircraft heading east toward its destination, climbing to and leveling off at 12,500 feet. Three minutes before the last identified radar target, the pilot obtained a partial weather briefing from the flight service station for the destination airports.
Wreckage
The wreckage was located in an area of high mountainous terrain. Evidence indicated the aircraft struck a ridgeline at the 12,400-foot level. The main wreckage came to rest on the east side of the ridge at 11,400 feet.
Investigation
During the post-crash investigation, no evidence of a mechanical failure or malfunction was found. Both occupants were killed in the accident.
Probable Cause
The official probable cause of the accident was poor inflight planning/decision. Factors contributing to the accident were dark night conditions and failure to maintain terrain clearance.