Descripción del Accidente ASN 23 NOV 1983 de Havilland Canada DHC-6 Twin Otter 300 C-GTLA - Lansdowne House Airport, ON (YLH)
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Estado:Accident investigation report completed and information captured
Fecha:mircoles 23 noviembre 1983
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:Austin Airways
Registración: C-GTLA
Numéro de série: 632
Año de Construcción: 1979
Motores: 2 Pratt & Whitney Canada PT6A-27
Tripulación:Fatalidades: 0 / Ocupantes: 2
Pasajeros:Fatalidades: 4 / Ocupantes: 5
Total:Fatalidades: 4 / Ocupantes: 7
Daños en la Aeronave: Anulado
Consecuencias: Written off (damaged beyond repair)
Ubicación:0,4 km (0.3 milles) de Lansdowne House Airport, ON (YLH) (   Canadá)
Fase: Aproximación (APR)
Naturaleza:Vuelo Doméstico Programado
Aeropuerto de Salida:Sandy Lake Airport, ON (ZSJ/CZSJ), Canadá
Aeropuerto de Llegada:Lansdowne House Airport, ON (YLH/CYLH), Canadá
Descripción:
A DHC-6 Twin Otter passenger plane, operated by Austin Airways, was damaged beyond repair in an accident near Lansdowne House Airport, ON (YLH).
There were 2 crew and 5 passengers on board of which 4 passengers were asphyxiated in the post crash fire. The 1 surviving passenger suffered serious injuries and the crew escaped with minor or no injuries.
The airplane operated on a domestic flight from Sandy Lake Airport, ON (ZSJ). Visibility at Lansdowne House was poor due to heavy snow snowfall
After executing an overshoot, the captain flew a second circuit without losing sight of the airfield. The aircraft turned toward the runway. The pilot called 'runway in sight' and shortly thereafter, the co-pilot noticed the radio altimeter pass through 200 feet. Moments before impact, the captain reported to the 1st officer that he was encountering whiteout conditions and moved to advance the power levers.
The aircraft was in line with the runway when it struck the snow-covered ice surface of the lake, about 1200 feet short of the runway threshold. The nose gear assembly was broken off at first impact. The aircraft then slid and rotated 180 degrees counter clockwise, struck large rocks on the shore and stopped 600 feet short of the runway.
The rear spars of each wing were separated from the fuselage; the fuel tanks were ruptured and the fuel lines were broken. Fire broke out on impact.

Probable Cause:

The final report did not contain a Probable Cause statement.

Fuentes:
» CASB Final Report
» The Montreal Gazette - Nov 24, 1983


Subsiguiente / acciones de seguridad

CASB issued 4 Safety Recommendations

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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 Sandy Lake Airport, ON to Lansdowne House Airport, ON as the crow flies is 375 km (234 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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