Accident Overview
A pilot reported that while flying above Lake Madison, he entered a shallow right turn at an altitude of approximately 200-300 feet. During the turn, he suddenly realized that he had lost considerable altitude and was in a steep right bank. The pilot attempted to level the helicopter and gain altitude, but the helicopter struck the water.
Pilot Account
The pilot stated that he was unaware of any pre-impact mechanical difficulties with the helicopter. His actions were focused on recovering from the unexpected altitude loss and steep bank, but the recovery effort was unsuccessful.
Post-Crash Inspection
A post-crash inspection of the helicopter did not discover any pre-existing mechanical deficiencies. The absence of mechanical issues suggests that the event was not caused by a failure of the aircraft's systems or components.
Investigation Findings
No further details regarding the helicopter's type, registration, operator, or occupants were provided. The investigation did not identify a probable cause for the accident.