Overview
A helicopter experienced a rollover during an off-airport landing in flat-light conditions. The pilot reported no preaccident mechanical anomalies.
Accident Sequence
The pilot was landing at an off-airport site when the helicopter touched down in flat-light conditions. Immediately after touchdown, the left skid sank into the snow, causing the helicopter to begin rolling to the left. The pilot attempted to correct the roll by applying right cyclic input. However, the pilot overcorrected, and the helicopter entered a dynamic roll to the right.
Damage
The dynamic roll resulted in substantial damage to the tail boom and main rotor drive system. The pilot stated that there were no preaccident mechanical anomalies with the helicopter.