Date: August 24, 1951
Location: Decoto, California
Aircraft: Douglas DC-6B
Reg: N37550
Airline: United Air Lines
Flight No: 615
Fatalities: 50 : 50

The aircraft struck a hill at an elevation of about 1,000 ft. at 225 to 240 mph. Neither of its 2 low-frequency receivers were tuned to the Oakland station and the captain may have attempted to fly by visual reference using the ADF. As a result, the flight was 3 miles off course and well below the minimum prescribed altitude.