What happened
The helicopter was operating under contract for the New Mexico Game and Fish Department to perform an elk herd evaluation. While flying northbound at an altitude of approximately 180 to 200 feet above the ground, the crew attempted to split a herd of elk for counting purposes.
A passenger in the right front seat reported that the aircraft was traveling at less than 10 knots when the pilot initiated a turn. Within three to five seconds of the maneuver, the aircraft rotated into the ground. The pilot believed the aircraft was actually traveling at approximately 30 knots and 100 feet above ground level (AGL) when the right turn was started.
The pilot reported that once the turn commenced, it could not be stopped despite applying full left pedal. At the time of the accident, the wind was estimated to be from the west at 5 to 10 knots, and the density altitude was calculated at 9,043 feet. The pilot stated there were no unusual noises or sensations immediately preceding the impact. There were no injuries reported.
Findings
The investigation considered factors related to unanticipated right yaw, which can be induced by low airspeeds, high power regimes, left crosswinds, tailwinds, and right turning maneuvers.