Last updated: 22 April 2021
| Estado: | Final |
| Fecha: | lunes 4 diciembre 1978 |
| Hora: | 19:45 MST |
| Tipo: |  de Havilland Canada DHC-6 Twin Otter 300 |
| Operador: | Rocky Mountain Airways |
| Registración: | N25RM |
| Numéro de série: | 387 |
| Año de Construcción: | 1973 |
| Horas Totales de la Célula: | 15145 |
| Motores: | 2 Pratt & Whitney Canada PT6A-27 |
| Tripulación: | Fatalidades: 1 / Ocupantes: 2 |
| Pasajeros: | Fatalidades: 1 / Ocupantes: 20 |
| Total: | Fatalidades: 2 / Ocupantes: 22 |
| Daños en la Aeronave: | Anulado |
| Consecuencias: | Written off (damaged beyond repair) |
| Ubicación: | 15 km (9.4 milles) ENE of Steamboat Springs, CO ( Estados Unidos de América)
|
| Fase: | En ruta (ENR) |
| Naturaleza: | Vuelo Doméstico Programado |
| Aeropuerto de Salida: | Steamboat Springs Airport, CO (SBS/KSBS), Estados Unidos de América |
| Denver-Stapleton International Airport, CO (DEN/KDEN), Estados Unidos de América | |
| Número de Vuelo: | 217 |
The aircraft took off from Steamboat Springs at 18:55 but was forced to return after encountering severe icing conditions. The Twin Otter struck a mountain at 10530 feet.
Probable Cause:
PROBABLE CAUSE: "Severe icing and strong downdrafts associated with a mountain wave which combined to exceed the aircraft's capability to maintain flight. Contributing to the accident was the captain's decision to fly into probable icing conditions that exceeded the conditions authorised by company directive."
Accident investigation:
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Fuentes:
» NTSB Safety Recommendations A-79-70» NTSB-AAR-79-6
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NTSB issued 4 Safety Recommendations
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Fotos
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 Steamboat Springs Airport, CO to Denver-Stapleton International Airport, CO as the crow flies is 186 km (116 miles).
Distance from Steamboat Springs Airport, CO to Denver-Stapleton International Airport, CO as the crow flies is 186 km (116 miles).
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.
