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Accident description
Last updated: 18 October 2017
Status:Final
Date:Saturday 17 November 1951
Time:10:14
Type:Silhouette image of generic DC4 model; specific model in this crash may look slightly different
Douglas C-54D-10-DC (DC-4)
Operator:Overseas National Airways - ONA
Registration: N79992
C/n / msn: 10832
First flight: 1945
Crew:Fatalities: 3 / Occupants: 3
Passengers:Fatalities: 0 / Occupants: 0
Total:Fatalities: 3 / Occupants: 3
Airplane damage: Damaged beyond repair
Location:Oakland Range, CA (   United States of America)
Phase: Approach (APR)
Nature:Training
Departure airport:Oakland International Airport, CA (OAK/KOAK), United States of America
Destination airport:Oakland International Airport, CA (OAK/KOAK), United States of America
Narrative:
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."

Classification:
Mid air collision
Loss of control

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


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