2 fatalities

Fatal Test Flight Crash of Ski-Equipped Seaplane Near Mission Dam (37795)

San Diego, United States of AmericaFlight

On September 5, 1945, a Grumman G-21A Goose (registration 37795) operated by United States Navy - USN was involved in an aviation accident near San Diego, United States of America in flight. 2 people were killed. Investigators recorded the probable cause as: The aircraft struck power cables during a low-altitude test flight, causing it to crash into the Mission Gorge near the Mission Dam. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Source recordUpdated 2026-08-25Data APIEditorial standards

A ski-equipped seaplane crashed into the Mission Gorge near the Mission Dam during a low-altitude test flight, resulting in the deaths of both pilots on board.

What happened

The incident occurred while the crew was conducting a test flight at a low altitude. The aircraft, described as a seaplane equipped with skis, made contact with power cables during this maneuver. Following the collision with the infrastructure, the plane crashed into the Mission Gorge area in close proximity to the Mission Dam.

Findings

The accident resulted in fatal injuries for the entire flight crew. Both pilots were killed in the crash. The specific sequence of events leading to the strike on the power lines and the subsequent impact with the terrain remains the central focus of the event description, highlighting the dangers associated with low-level flight operations near fixed infrastructure.

Probable cause

The aircraft struck power cables during a low-altitude test flight, causing it to crash into the Mission Gorge near the Mission Dam.

Frequently asked questions

What happened in the 5 Sept 1945 Grumman G-21A Goose accident near San Diego, United States of America?

A ski-equipped seaplane crashed into the Mission Gorge near the Mission Dam during a low-altitude test flight, resulting in the deaths of both pilots on board.

Were there any fatalities in the 5 Sept 1945 Grumman G-21A Goose accident?

The accident was fatal, resulting in 2 fatalities.

What aircraft was involved and where did it happen?

The accident on 5 Sept 1945 involved a Grumman G-21A Goose, registration 37795, operated by United States Navy - USN, at San Diego, United States of America.

What was the probable cause of the accident?

The aircraft struck power cables during a low-altitude test flight, causing it to crash into the Mission Gorge near the Mission Dam.