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Accident description
Last updated: 19 October 2017
Status:
Date:Friday 28 October 1960
Time:11:39
Type:Silhouette image of generic DC4 model; specific model in this crash may look slightly different
Douglas C-54A-10-DC (DC-4)
Operator:Northwest Orient Airlines
Registration: N48762
C/n / msn: 10320
First flight: 1944
Crew:Fatalities: 4 / Occupants: 4
Passengers:Fatalities: 8 / Occupants: 8
Total:Fatalities: 12 / Occupants: 12
Airplane damage: Damaged beyond repair
Location:32 km (20 mls) W of Missoula, MT (   United States of America)
Phase: En route (ENR)
Nature:Domestic Scheduled Passenger
Departure airport:Spokane International Airport, WA (GEG/KGEG), United States of America
Destination airport:Missoula Airport, MT (MSO/KMSO), United States of America
Flightnumber: 104
Narrative:
The aircraft, on a flight from Spokane, was seen flying in and along the Clark Fork Valley. The DC-4 started to descend deeper into the valley; visibility became worse due to light snow showers and the tops of the mountains surrounding the valley were obscured by the overcast. The plane entered a steep left banking turn and the nose was raised in an apparent attempt to turn and climb out through an intersecting valley. The aircraft continued to sink, rolled left and crashed inverted.

Probable Cause:

PROBABLE CAUSE: "The failure of the pilot to continue in accordance with his IFR flight plan by attempting a VFR approach during instrument weather conditions."

Classification:
VFR flight in IMC
Loss of control

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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Spokane International Airport, WA to Missoula Airport, MT as the crow flies is 269 km (168 miles).
Accident location: Approximate; accuracy within a few kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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