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Last updated: 15 August 2020
Statuts:Enquête Officielle
Date:samedi 17 novembre 1951
Heure:10:14
Type/Sous-type:Silhouette image of generic DC4 model; specific model in this crash may look slightly different
Douglas C-54D-10-DC (DC-4)
Compagnie:Overseas National Airways - ONA
Immatriculation: N79992
Numéro de série: 10832
Année de Fabrication: 1945
Equipage:victimes: 3 / à bord: 3
Passagers:victimes: 0 / à bord: 0
Total:victimes: 3 / à bord: 3
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Oakland Range, CA (   Etats-Unis d'Amérique)
Phase de vol: En approche (APR)
Nature:Entrainement
Aéroport de départ:Oakland International Airport, CA (OAK/KOAK), Etats-Unis d'Amérique
Aéroport de destination:Oakland International Airport, CA (OAK/KOAK), Etats-Unis d'Amérique
Détails:
An Overseas National C-54D (N79992, msn 10832) took off from Oakland at 08:20 on a captain's instrument competency check. At 09:23 the flight was given clearance to make a practice range approach and to remain above 1500 feet. At 09:35 a California Eastern C-54 (N4002B, msn 10474) took off from Oakland for a similar check-flight.
The two C-54 aircraft approached Oakland Range (located 0,2 mile NE of runway 15) at 3000 feet; the Overseas National aircraft on a 124° heading at a speed of 140 mph, the California Eastern plane on a 75° heading at a speed of 170 mph. Both aircraft continued until they collided. The empennage of the ONA aircraft was torn off and the plane crashed on a highway and caught fire. Eleven people on the ground were injured. The other C-54 was able to make an emergency landing at San Francisco Airport.

Probable Cause:

PROBABLE CAUSE: "The failure of the Overseas safety pilot and/or his observer to observe and so avoid the other aircraft and the failure of California's safety pilot to carry a qualified observer aboard the aircraft to insure adequate field of vision."

Sources:
» CAB File No. 1-0098
» ICAO Circular 38-AN/33 (21-24)


Photos

photo of -
Distance closing diagram.
 

Plan

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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