24 fatalities

Military Aircraft Crashes into Pacific Ocean During Nuclear Test Observation Mission (61-0331)

Pacific Ocean, WorldFlight

On June 13, 1971, a Boeing C-135 Stratolifter (registration 61-0331) operated by United States Air Force - USAF (since 1947) was involved in an aviation accident near Pacific Ocean, World in flight. 24 people were killed. Investigators recorded the probable cause as: Due to lack of evidences, the exact cause of the accident could not be determined with certainty. However, it was reported that the aircraft was intact until impact with water surface. 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 military aircraft on an observation mission for French nuclear tests crashed into the Pacific Ocean after entering a dive. All 24 occupants perished. The exact cause remains undetermined, but the aircraft was intact until impact.

Accident Details

A military aircraft departed Pago Pago on a flight to Hickam Field, Honolulu, as part of an observation mission for French atmospheric nuclear tests in the Pacific. While flying in good weather conditions at an altitude of 33,000 feet and a speed of 870 km/h, a crew member contacted air traffic control, but the message was inaudible. Five minutes later, the aircraft entered a dive and crashed into the Pacific Ocean approximately 1,100 km southwest of Hawaii.

Debris and Occupants

Few debris were found floating on the water. None of the 24 occupants survived the crash. The occupants included Donald E. Ashland, Captain Byron C. Burnett, Rola F. Blanchard, John P. Cahill, Thomas R. Connor, Charles V. Dito, 1st Lieutenant James M. Gilbert, Dean L. Hoar, Staff Sergeant Kenneth Steven Kowal, Major John R. McGinn, Technical Sergeant Hubert Miles Jr., Allen Moriffette, Major William Edward Page Jr., David Penney, Lieutenant Colonel Victor John Reinhart, Captain Perry Thomas Rose, Colonel Billy L. Skipworth, Edward M. Slagel, Anthony J. Theriault, John B. Tumas, Major William Herman Unsderfer Jr., Major Joseph B. William, and Staff Sergeant Elno Roe Weimer.

Official Findings

The exact cause of the accident could not be determined with certainty due to lack of evidence. The aircraft was reported to be intact until impact with the water surface. It was also believed that a recent technical modification—installation of 11 additional portholes and a radome a few days prior—did not have any incidence with the accident.

Probable cause

Due to lack of evidences, the exact cause of the accident could not be determined with certainty. However, it was reported that the aircraft was intact until impact with water surface. Also, it is believed that the recent technical modification did not have any incidence with the accident.