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Last updated: 21 November 2019
Statuts:Enquête Officielle
Date:mardi 2 janvier 1973
Heure:01:34
Type/Sous-type:Silhouette image of generic B703 model; specific model in this crash may look slightly different
Boeing 707-321C
Compagnie:Pacific Western Airlines
Immatriculation: CF-PWZ
Numéro de série: 18826/389
Année de Fabrication: 1964
Heures de vol:33059
Cycles:9458
Moteurs: 4 Pratt & Whitney JT3D-3B
Equipage:victimes: 5 / à bord: 5
Passagers:victimes: 0 / à bord: 0
Total:victimes: 5 / à bord: 5
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:ca 3 km SE of Edmonton International Airport, AB (YEG) (   Canada)
Phase de vol: En approche (APR)
Nature:Cargo
Aéroport de départ:Toronto International Airport, ON (YYZ/CYYZ), Canada
Aéroport de destination:Edmonton International Airport, AB (YEG/CYEG), Canada
Numéro de vol:3801
Détails:
On the ground at Toronto cattle pens were installed and a cargo of 86 cattle was loaded. The Boeing 707 took off at 04:47 GMT for a flight to Edmonton. The en route part of the flight was uneventful. At 08:29 the flight was cleared for a straight in back-course ILS approach to runway 29. The first officer, who had just been promoted to Boeing 707 operations, was to perform the approach in blowing snow conditions. This approach was the first one after a 6-week holiday, so he lacked recent Boeing 707-experience. With the added factors of fatigue, turbulent air, and a heavily loaded aircraft the situation would have become extremely difficult. At some point late in the approach the captain took over control of the aircraft and tried to arrest the sink rate. The plane contacted poplar trees, 3137 m short of the runway. It struck the ground a glancing blow, and the tail fin struck powerlines. The aircraft finally struck a large ridge in the middle of a gravel pit. The cockpit section and a forward portion of the fuselage broke away and 86 cattle, the cargo on board, shot forward through the open front section of the fuselage and were thrown a distance of up to 100 m. A fire erupted.

Probable Cause:

Since the investigation was not done in accordance with ICAO Annex 13, no Probable Cause was identified.



Photos

photo of Boeing-707-321C-CF-PWZ
accident date: 02-01-1973
type: Boeing 707-321C
registration: CF-PWZ
photo of Boeing-707-321C-CF-PWZ
accident date: 02-01-1973
type: Boeing 707-321C
registration: CF-PWZ
photo of Boeing-707-321C-CF-PWZ
accident date: 02-01-1973
type: Boeing 707-321C
registration: CF-PWZ
photo of Boeing-707-321C-CF-PWZ
accident date: 02-01-1973
type: Boeing 707-321C
registration: CF-PWZ
photo of Boeing-707-321C-CF-PWZ
accident date: 02-01-1973
type: Boeing 707-321C
registration: CF-PWZ
photo of Boeing-707-321C-CF-PWZ
accident date: 02-01-1973
type: Boeing 707-321C
registration: CF-PWZ
photo of Boeing-707-321C-CF-PWZ
accident date: 02-01-1973
type: Boeing 707-321C
registration: CF-PWZ
photo of Boeing-707-321C-CF-PWZ
accident date: 02-01-1973
type: Boeing 707-321C
registration: CF-PWZ
photo of Boeing-707-321C-CF-PWZ
accident date: 02-01-1973
type: Boeing 707-321C
registration: CF-PWZ
 

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 Toronto International Airport, ON et Edmonton International Airport, AB est de 2670 km (1669 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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