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Accident
Last updated: 23 October 2017
Estado:Final
Fecha:martes 15 febrero 1983
Hora:11:02
Tipo:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 300
Operador:Sierra Pacific Airlines
Registración: N361V
Numéro de série: 361
Año de Construcción: 1973
Horas Totales de la Célula:4767
Motores: 2 Pratt & Whitney Canada PT6A-27
Tripulación:Fatalidades: 0 / Ocupantes: 2
Pasajeros:Fatalidades: 0 / Ocupantes: 6
Total:Fatalidades: 0 / Ocupantes: 8
Daños en la Aeronave: Destruido
Consecuencias: Written off (damaged beyond repair)
Ubicación:1,7 km (1.1 milles) S of Hailey-Sun Valley Airport, ID (SUN) (   Estados Unidos de América)
Fase: Aproximación (APR)
Naturaleza:Vuelo Doméstico Programado
Aeropuerto de Salida:Boise Air Terminal, ID (BOI/KBOI), Estados Unidos de América
Aeropuerto de Llegada:Hailey-Sun Valley Airport, ID (SUN/KSUN), Estados Unidos de América
Número de Vuelo: 868
Descripción:
The Twin Otter, operating on a flight for Transwestern, approached Hailey runway 31 at an altitude of 800 feet when the captain reduced power. Suddenly, the aircraft nosed over and descended steeply. The pilot tried to control the descent by adding power. The plane crash-landed on a highway, veered off and struck a 4 feet high snow bank.

Probable Cause:

PROBABLE CAUSE: "The in-flight loss of elevator control following separation of the control rod from the torque tube at a connection where the company's maintenance department had used a non-standard, unsecured bolt, which the company's inspection department had failed to detect. Contributing to the accident was the company's failure to maintain the separation of maintenance and inspection functions required by the maintenance program approved by the Federal Aviation Administration, and the failure of the FAA to detect the company's deviation from approved maintenance procedures during surveillance inspection."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year
Accident number: NTSB/AAR-84-03
Download report: Final report

Fuentes:
» Location of Commercial Aircraft Accidents/Incidents Relative to Runways / FAA, Office of Safety Oversight (DOT/FAA/AOV 90-1)
» NTSB-AAR-84-03


Subsiguiente / acciones de seguridad

NTSB issued 2 Safety Recommendations

Show all AD's and Safety Recommendations

Fotos

photo of de Havilland Canada DHC-6 Twin Otter 300 N361V
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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 Boise Air Terminal, ID to Hailey-Sun Valley Airport, ID as the crow flies is 154 km (96 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.
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