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Accident
Last updated: 21 October 2017
Statuts:Enquête Officielle
Date:dimanche 11 août 1957
Heure:18:15 UTC
Type/Sous-type:Silhouette image of generic DC4 model; specific model in this crash may look slightly different
Douglas DC-4
Compagnie:Maritime Central Airways
Immatriculation: CF-MCF
Numéro de série: 18374
Année de Fabrication: 1944
Equipage:victimes: 6 / à bord: 6
Passagers:victimes: 73 / à bord: 73
Total:victimes: 79 / à bord: 79
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:7,2 km (4.5 milles) W of Issoudun, QC (   Canada)
Phase de vol: En vol (ENR)
Nature:Charter International
Aéroport de départ:Reykjavík-Keflavík International Airport (KEF/BIKF), Islande
Aéroport de destination:Goose Bay Airport, NF (YYR/CYYR), Canada
Numéro de vol: 315
Détails:
A Douglas DC-4 operated by Maritime Central Airways crashed after the flight crew lost of control of the aircraft in turbulence. The aircraft was destroyed and all 79 on board were killed.
The flight departed London, U.K. at 21:48 hours GMT (August 10) for a flight to Toronto, Canada with refueling stops at Keflavik, Iceland and Goose Bay, Canada. The aircraft departed Keflavik at 05:12 GMT (August 11) following a 66-minute stop.
At 13:20 GMT the aircraft, following receipt of the Montreal weather forecast, advised Goose Bay that it would overfly Goose Bay and proceed to Montreal. Approaching Goose Bay a request for a clearance to cruise at 4000 ft to Lake Eon and at 6000 ft to Montreal was denied, following which the pilot chose to proceed VFR on Airway Red 1 until a clearance was issued at 16:07 GMT for an IFR flight at 6000 ft.
The aircraft reached Quebec at 18:07 and then estimated arrival at Montreal at 19:02 GMT. Last radio contact was at 18:10 when Quebec Radio Range Station relayed a message to the aircraft requesting it to contact Montreal Range approaching Rougemont for clearance. The aircraft was flying at about 6000 feet when it entered an active cumulonimbus cloud, including heavy rain and strong gusty winds.
In these conditions the aircraft entered an uncontrolled descent untik it struck the ground in an almost vertical (70 degrees nose down, slightly left wing down) attitude at a speed over 200 kts.

Probable Cause:

PROBABLE CAUSE: "Severe turbulence encountered whilst flying in a cumulonimbus cloud, resulting in a chain of events quickly leading up to a complete loss of control and causing the aircraft to dive to the ground in a near vertical nose-down attitude."

Sources:
» ICAO Accident Digest, Circular 59-AN/54 (18-23)


Opérations de secours
As the pilots were on duty for nearly 20 hours, this affected their performance in an emergency situation. A Canadian standard was adopted for on-duty time limitations.

issued 3 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 Reykjavík-Keflavík International Airport et Goose Bay Airport, NF est de 2419 km (1512 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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Douglas DC-4

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