Estado: | Accident investigation report completed and information captured |
Fecha: | martes 15 febrero 1983 |
Hora: | 11:02 |
Tipo: | 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:
|
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
Issued: 14-MAR-1984 | To: FAA | A-84-14 |
ISSUE AN AIR CARRIER MAINTENANCE BULLETIN TO EMPHASIZE (Closed - Acceptable Alternate Action) |
Issued: 14-MAR-1984 | To: FAA | A-84-15 |
ISSUE AIR CARRIER MAINTENANCE AND OPERATIONS BULLETINS TO EMPHASIZE TO AIR CARRIER AIRWORTHINESS AND OPERATIONS INSPECTORS THE REGULATORY REQUIREMENTS RELATED TO THE RECORDING OF MECHANICAL IRREGULARITIES IN AIRCRAFT MAINTENANCE LOGS AND THE NEED FOR PROPER SUREVEILLANCE TO CONFIRM CONFORMITY WITH THE REQUIREMENTS, INCLUDING SCRUTINY OF AIRCRAFT MAINTENANCE LOGS AND OTHER MAINTENANCE RECORDS TO VERIFY THAT APPLICABLE MAINTENANCE CORRECTIVE ACTIONS CORRELATE TO MECHANICAL IRREGULARITIES RECORDED BY FLIGHTCREWS IN THE AIRCRAFT MAINTENANCE LOGS. (Closed - Acceptable Action) |
Show all...
Fotos
accident date:
15-02-1983type: de Havilland Canada DHC-6 Twin Otter 300
registration: N361V
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.