7 fatalities

Four-Engine Aircraft Training Mission Crash in the Atlantic Ocean (152724)

Lajes, PortugalFlight

On April 26, 1978, a Lockheed P-3 Orion (registration 152724) operated by United States Navy - USN was involved in an aviation accident near Lajes, Portugal in flight. 7 people were killed. Investigators recorded the probable cause as: The exact cause of the accident remains unknown. 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)Primary reportUpdated 2026-06-12Data APIEditorial standards

A four-engine aircraft crashed into the Atlantic Ocean about 32 km northeast of Lajes during a training mission. All seven crew members were killed, and the exact cause remains unknown.

Incident Overview A four-engine aircraft was conducting a training mission departing from Lajes when it crashed into the Atlantic Ocean under unknown circumstances. The crash site was located approximately 32 kilometers northeast of Lajes. Only a small amount of debris was found floating on the water's surface. All seven crew members on board were killed in the accident. ## Crew Members The seven crew members who perished were: Lt David G. Schwerstein, Lt Michael E. Hayes, Ltjg Michael Dziubak, Ad1 Robert L. Hasselbacher, Ad1 Randolph L. Affield, Ao3 Robert J. Elmore, and At3 Weslie Donald Putnam. ## Investigation Findings The official investigation concluded that the exact cause of the accident remains unknown.

Probable cause

The exact cause of the accident remains unknown.