Ford 5 accident at San Diego, United States of America, 21 Apr 1929 (NC9636)
On April 21, 1929, a Ford 5 (registration NC9636) operated by Maddux Airlines was involved in an aviation accident near San Diego, United States of America in flight. 5 people were killed. Investigators recorded the probable cause as: The pilot of the USAAC's aircraft was cruising in an unauthorized zone at the time of the accident, in violation of published navigation rules. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 1 related events involving the same aircraft type or operator are linked below.
Probable cause
The pilot of the USAAC's aircraft was cruising in an unauthorized zone at the time of the accident, in violation of published navigation rules.
— NTSB Determination
Accident narrative
Ten minutes after takeoff from San Diego Airport, while climbing to a height of 2,000 feet, the three engine aircraft collided with an USAAC's Boeing PW-9D registered 28-37. Both aircraft dove into the ground and were totally destroyed. All six people onboard both aircraft were killed.
Probable cause (official findings): The pilot of the USAAC's aircraft was cruising in an unauthorized zone at the time of the accident, in violation of published navigation rules.