Incident Overview
A witness observed an aircraft settle into the ocean during low-level cruise flight adjacent to a beach. The weather conditions at the time were overcast, with an indistinct horizon and calm sea. The flight had filed an IFR flight plan, but no contact was made with air traffic control.
Examination Findings
Examination of the engines and propeller did not reveal any mechanical failure. Damage to the propeller blades indicated that they were operating within cruise range at the time of impact. However, water and salt corrosion damage prevented detailed examination of the aircraft's systems.
Investigation Status
Due to the extent of corrosion damage, investigators were unable to conduct thorough inspections of the aircraft's systems. The cause of the aircraft settling into the ocean has not been determined from the available evidence.