What happened
During a scheduled training exercise, a four-engine aircraft experienced a loss of control. The unstable flight path led to an uncontrolled descent, causing the airframe to impact the waters of San Francisco Bay. Emergency response teams subsequently recovered the survivors from the water. Of the five individuals on board, four were successfully rescued and survived the incident. Tragically, one crew member did not survive the crash and was confirmed as a fatality.
Findings
The source material does not provide specific technical details regarding the mechanical failure or pilot error that initiated the loss of control. The event is documented strictly as an in-flight accident occurring during a training mission, resulting in a single death and four survivors.