Accident Overview
A helicopter was in cruise flight when the pilot heard a pop and experienced a loss of engine power. The weather at the time included light falling snow. The pilot executed an autorotation to the ground, which was characterized as rough terrain. The landing was hard, causing the helicopter to roll over onto its right side.
Pilot Actions
Upon hearing the pop and sensing the engine power loss, the pilot immediately initiated an autorotation. The descent was controlled, but the touchdown on the uneven ground was forceful. The helicopter subsequently rolled over onto its right side after the hard landing.
Aircraft Examination
Post-accident examination of the helicopter revealed that it was not equipped with a deflector kit or flow vanes. Additionally, the helicopter did not have an engine relight system installed. These findings were noted in the examination, but no further causal analysis is provided in the source.