Incident Overview
A helicopter conducting a powerline patrol suffered a loss of power and executed a forced landing near an electric plant in Wading River. According to the pilot, after completing a 180-degree turn, a loud bang was heard and the engine out light illuminated. The engine did not respond when power was added.
Pilot Actions
The pilot entered an autorotation while turning toward an open area. At touchdown, the main rotor blades flexed downward and struck the rear portion of the tail boom, severing it.
Investigation Findings
An engine teardown was performed following the incident. Examination concluded that a compressor failure had occurred.