Helicopter rolls onto its side during positioning for passenger pickup in blowing snow (N58220)

What happened

The aircraft was being positioned at a remote site with the intention of picking up passengers. During the maneuvering phase required to establish a suitable landing spot, the pilot lost visual reference due to blowing snow conditions. The pilot reported feeling the right skid strike the ground and subsequently lowered the collective pitch control. Despite this input, the helicopter continued to roll until the main rotor blades made contact with the ground. The fuselage ultimately came to rest on its side.

The investigation

No specific mechanical examination details were provided in the source material regarding post-accident inspection of the airframe or rotor system beyond the description of the final resting position and contact points.

Findings

Contributing factors included the weather conditions which reduced visibility and the pilot's loss of visual reference during a critical maneuvering phase. The sequence of events indicates that despite corrective action taken by lowering the collective, the aircraft was unable to recover from the roll initiated by the skid contact.