Accident Details
A commercial helicopter pilot was conducting an on-demand, Title 14, CFR Part 135 air taxi flight with one passenger to a remote site. The surrounding area was characterized by snow-covered, flat, featureless terrain. Low fog, reduced visibility, and flat light conditions diminished the pilot's ability to discern a horizon or terrain features.
The pilot reported that visibility deteriorated to about 1 to 2 miles, and he was unable to distinguish any topographic features on the snow-covered terrain. He elected to make a precautionary landing to wait for improved visibility. After approximately 10 minutes, he decided to continue to the destination.
Sequence of Events
Just after takeoff, flat light conditions again reduced the pilot's ability to recognize any topographical features. While attempting to establish a stable hover, the pilot erroneously believed the helicopter was not moving. During this time, the helicopter's right skid struck the snow-covered terrain. The impact caused the helicopter to roll to the right, and the main rotor blades struck the ground. As the blades contacted the ground, the helicopter rolled onto its right side.
Damage and Mechanical Condition
The helicopter sustained substantial damage to the fuselage, tail boom assembly, and the main and tail rotor drive systems. The pilot reported that there were no preaccident mechanical anomalies with the helicopter.