Primary finding
Probable cause
The pilot did not maintain adequate clearance from the trees.
Investigator assessment
Analysis narrative
According to the pilot, he was herding cattle with the helicopter. He descended to an altitude of about 10 feet to get the cattle to turn and enter a pen. After the cattle entered the pen, he maneuvered away and gained altitude to clear some nearby trees. The pilot thought the helicopter was clear of the trees; however, the tailrotor impacted a tree. The helicopter started to spin, so he reduced the throttle to stop the spin. The helicopter impacted terrain, resulting in substantial damage the main rotor blades, fuselage, and tailboom.
Source record
Factual narrative
According to the pilot, he was herding cattle with the helicopter. He descended to an altitude of about 10 feet to get the cattle to turn and enter a pen. After the cattle entered the pen, he maneuvered away and gained altitude to clear some nearby trees. The pilot thought the helicopter was clear of the trees; however, the tailrotor impacted a tree. The helicopter started to spin, so he reduced the throttle to stop the spin. The helicopter impacted terrain, resulting in substantial damage the main rotor blades , fuselage, and tailboom.