What happened
During a period of cruise flight at an altitude of 11,000 feet, the aircraft experienced a sudden loss of control. The situation became unmanageable, forcing the crew to initiate an emergency egress from the cabin.
While all members of the crew successfully exited the aircraft via bailout, the incident resulted in one fatality when one individual drowned following their landing. The aircraft subsequently impacted a field, where the impact caused the total destruction of the airframe.
Findings
The provided information indicates that the aircraft became uncontrollable while maintaining an altitude of 11,000 feet. The primary factor in the loss of the airframe was the uncontrollable flight state encountered during the cruise phase.