On April 1, 1980, a Cessna 441 Conquest (registration N36941) operated by Montana Power Company was involved in an aviation accident near Butte, United States of America during landing or approach. 2 people were killed. Investigators recorded the probable cause as: Controlled collision with ground during a missed approach due to improper IFR operation. Contributing factors: low ceiling, fog, snow. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 2 related events involving the same aircraft type or operator are linked below.
During a missed approach to Butte-Bert Mooney Airport, a twin-engine airplane struck a hill 11 miles south of the airport, killing both occupants.
Accident
On approach to Butte-Bert Mooney Airport, the pilot of a twin-engine airplane encountered poor weather conditions. The pilot decided to initiate a go-around and divert to another airport. While at a low altitude, the airplane struck a hill and crashed approximately 11 miles south of the airport. Both occupants were killed.
Probable Cause
The official investigation determined that the probable cause of the accident was a controlled collision with ground during a missed approach due to improper IFR operation. Contributing factors reported by the investigation included low ceiling, fog, and snow.
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