What happened
During the initial phase of flight, specifically while the aircraft was climbing out from the airport, the pilot encountered a sudden loss of forward visibility. The canopy became heavily fogged, obscuring the view through the windshield. Unable to see ahead, the pilot decided to execute a precautionary landing rather than continuing the climb.
To maintain situational awareness during this maneuver, the pilot relied on visual references obtained by looking out the side window. As the aircraft descended toward the ground, the left skid contacted the snow-covered surface. This contact caused the helicopter to roll approximately 30 degrees to the left.
The impact and subsequent rollover led to catastrophic structural failures. The main rotor blade severed the tail boom, and the main rotor shaft fractured under the stress. Following the shaft failure, a main rotor blade penetrated the left side of the cabin, causing significant damage to the interior structure.