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Last updated: 26 March 2019
Date:Tuesday 9 February 1937
Type:Silhouette image of generic DC3 model; specific model in this crash may look slightly different
Douglas DC-3A-197
Operator:United Airlines
Registration: NC16073
C/n / msn: 1913
First flight: 1936
Crew:Fatalities: 3 / Occupants: 3
Passengers:Fatalities: 8 / Occupants: 8
Total:Fatalities: 11 / Occupants: 11
Aircraft damage: Damaged beyond repair
Location:3 km (1.9 mls) NE off San Francisco Municipal Airport, CA (SFO) (   United States of America)
Phase: Approach (APR)
Nature:Domestic Scheduled Passenger
Departure airport:Burbank-Union Air Terminal (BUR/KBUR), United States of America
Destination airport:San Francisco Municipal Airport, CA (SFO/KSFO), United States of America
Flightnumber:Trip 23
Crashed into San Francisco Bay while on approach. The co-pilot dropped his microphone which jammed the controls, preventing the pilot from pulling out of the glide. Nine passengers and three crew died.

Probable Cause:

PROBABLE CAUSE: "Accidental jamming of the elevator controls as a result of a microphone being inadvertently dropped and lodging in such a position that the crew was unable to prevent rapid descent of the airplane."

Loss of control


photo of Douglas DC-3A-197 NC16073
photo of Douglas DC-3A-197 NC16073
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This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Burbank-Union Air Terminal to San Francisco Municipal Airport, CA as the crow flies is 521 km (326 miles).
Accident location: Approximate; accuracy within a few kilometers.

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