4 fatalities

XP2V-1 Prototype Crash During Test Flight (48238)

Oyster, United States of AmericaFlight

On May 11, 1950, a Lockheed P-2 Neptune (registration 48238) operated by United States Navy - USN was involved in an aviation accident near Oyster, United States of America in flight. 4 people were killed. Investigators recorded the probable cause as: The separation of an engine from the aircraft caused a loss of control and subsequent impact with the ground. 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 2026-06-14Data APIEditorial standards

A Lockheed XP2V-1 prototype crashed during a flight test after an engine became detached from the aircraft.

What happened

During a scheduled test flight, the second XP2V-1 prototype experienced a catastrophic mechanical failure. While the crew was conducting flight operations, one of the engines separated from the airframe and fell away from the aircraft.

Following the loss of the engine, the aircraft became uncontrollable. The plane entered a steep dive toward the earth, ultimately impacting a field. The impact resulted in the deaths of all four crew members on board.

Findings

  • An engine detached from the wing during the flight sequence.
  • The loss of the engine led to an unrecoverable descent into the ground.

Probable cause

The separation of an engine from the aircraft caused a loss of control and subsequent impact with the ground.

Frequently asked questions

What happened in the 11 May 1950 Lockheed P-2 Neptune accident near Oyster, United States of America?

A Lockheed XP2V-1 prototype crashed during a flight test after an engine became detached from the aircraft.

Were there any fatalities in the 11 May 1950 Lockheed P-2 Neptune accident?

The accident was fatal, resulting in 4 fatalities.

What aircraft was involved and where did it happen?

The accident on 11 May 1950 involved a Lockheed P-2 Neptune, registration 48238, operated by United States Navy - USN, at Oyster, United States of America.

What was the probable cause of the accident?

The separation of an engine from the aircraft caused a loss of control and subsequent impact with the ground.