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Last updated: 5 December 2021
Statuts:Enquête Officielle
Date:mercredi 23 novembre 1983
Type/Sous-type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 300
Compagnie:Austin Airways
Immatriculation: C-GTLA
Numéro de série: 632
Année de Fabrication: 1979
Moteurs: 2 Pratt & Whitney Canada PT6A-27
Equipage:victimes: 0 / à bord: 2
Passagers:victimes: 4 / à bord: 5
Total:victimes: 4 / à bord: 7
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:0,4 km (0.3 milles) de Lansdowne House Airport, ON (YLH) (   Canada)
Phase de vol: En approche (APR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Sandy Lake Airport, ON (ZSJ/CZSJ), Canada
Aéroport de destination:Lansdowne House Airport, ON (YLH/CYLH), Canada
Détails:
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.

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


Opérations de secours

CASB issued 4 Safety Recommendations

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Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Sandy Lake Airport, ON et Lansdowne House Airport, ON est de 375 km (234 miles).
Accident location: Approximate; accuracy within a few kilometers.

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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