What happened
During a low-altitude maneuver over a lake, the aircraft type made contact with the water surface, creating a large spray of water before ascending into a climb. As the flight continued toward the shoreline, the right propeller ceased rotation. This was followed by the aircraft entering a sharp right-hand bank, which resulted in a high-speed impact with the ground.
Findings
Post-accident inspections of the wreckage showed that the right propeller lever had been moved to the feathered position. Detailed teardowns of the propellers confirmed that the right propeller was indeed feathered at the time of the crash, while the left propeller was operating within the low pitch range. Mechanical examinations of both engines showed no signs of malfunctions or anomalies prior to the accident, and the manufacturer determined that both engines were capable of generating necessary power before the impact.
Toxicological analysis of the pilot's remains revealed the presence of several substances. Testing of vitreous, blood, and brain fluids showed ethanol concentrations of 0.178%, 0.09%, and 0.114%, respectively. Additionally, the presence of acetaldehyde and 2-propanol, which are metabolites of ethanol, confirmed the ingestion of alcohol prior to the flight.