Incident Overview
A helicopter came to rest upside down in a lake after the pilot experienced a loss of response from the collective pitch controls while attempting to land near an alligator's nest. The pilot reported that during the landing approach, the helicopter did not respond to collective pitch inputs. In response, he attempted to perform a slide-on-landing onto the water surface. However, the rear portion of the fixed flotation gear struck a levee, causing the helicopter to pitch forward and roll over before settling inverted in the lake.
Post-Event Examination
An examination of the helicopter's flight controls following the accident revealed no pre-impact anomalies or malfunctions. The control systems were found to be functional and intact, indicating that the failure to respond to collective pitch inputs may have been related to other factors not identified during the inspection.
Operational Context
The landing was being conducted near a lake in close proximity to an alligator's nest. The pilot's decision to attempt a water landing was prompted by the unresponsive collective pitch controls. The impact with the levee occurred as the helicopter touched down on the water, leading to the subsequent rollover.
Condition of the Helicopter
The helicopter came to rest inverted in the lake. The extent of damage resulting from the impact and rollover was not specified. No information was provided regarding the occupants or any injuries sustained.