Incident Overview
While returning to an airport during cruise flight, the pilot of a single-engine aircraft experienced a sudden and severe engine malfunction. According to the pilot's account, the engine began shaking violently, followed by smoke emanating from the front of the engine compartment. Shortly thereafter, both the engine and propeller stopped abruptly. Recognizing that the runway could not be reached, the pilot and any occupants quickly decided to head for the water, executing a forced landing.
Examination Findings
A post-incident examination of the engine revealed a one-inch hole in the crankcase near the number two cylinder. Additionally, the number one connecting rod bolt was found to have separated. The separated bolt was not located during the examination, precluding further analysis of its failure mode.
No Further Details
No information regarding the aircraft type, registration, operator, date, time of day, weather conditions, or air traffic control involvement was provided. The number of occupants and any injuries were not disclosed in the source.
Probable Cause
The accident investigation source did not state a probable cause for the engine failure or the incident. Therefore, no probable cause is assigned here.