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Accident
Last updated: 17 October 2017
Status:Definitief
Datum:dinsdag 15 februari 1983
Tijd:11:02
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 300
Luchtvaartmaatschappij:Sierra Pacific Airlines
Registratie: N361V
Constructienummer: 361
Bouwjaar: 1973
Aantal vlieguren:4767
Motoren: 2 Pratt & Whitney Canada PT6A-27
Bemanning:slachtoffers: 0 / inzittenden: 2
Passagiers:slachtoffers: 0 / inzittenden: 6
Totaal:slachtoffers: 0 / inzittenden: 8
Schade: Vernield
Gevolgen: Written off (damaged beyond repair)
Plaats:1,7 km (1.1 mijl) S of Hailey-Sun Valley Airport, ID (SUN) (   Verenigde Staten)
Fase: Nadering (APR)
Soort vlucht:Binnenlandse lijnvlucht
Vliegveld van vertrek:Boise Air Terminal, ID (BOI/KBOI), Verenigde Staten
Vliegveld van aankomst:Hailey-Sun Valley Airport, ID (SUN/KSUN), Verenigde Staten
Vluchtnummer: 868
Beschrijving:
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

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


Veiligheidsmaatregelen

NTSB issued 2 Safety Recommendations

Show all AD's and Safety Recommendations

Foto's

photo of de Havilland Canada DHC-6 Twin Otter 300 N361V
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Kaart
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Boise Air Terminal, ID en Hailey-Sun Valley Airport, ID bedraagt 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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