What happened
During a flight intended to participate in the Guam Liberation Day celebrations, an aircraft operating under the call sign 'Raider 21' departed from Andersen AFB. The mission involved a flight path around the perimeter of Guam Island. Approximately 15 minutes after takeoff, the aircraft began a descent from 14,000 feet toward 1,000 feet.
During this descent phase, the aircraft became uncontrollable. The aircraft type (not specified in source) crashed into the ocean at a location roughly 50 km north of Guam Island. The impact caused the aircraft to disintegrate, leaving only a small amount of debris at the site. There were six fatalities among the crew members on board.
Findings
While the specific technical reason for the loss of control was not detailed in the provided report, the aircraft became uncontrollable during its descent from 14,000 feet.