Incident Summary
A helicopter pilot, after completing an aerial application flight, set the bucket down in a pre-determined operations zone near a semi-truck loading hopper for refilling. Another truck arrived to top off the semi-truck hopper, emitting fertilizer dust that reduced visibility. Concerned, the pilot advised ground crew of a temporary move to a new operations zone.
Pilot Actions
In the new zone, as a skid steer approached, the pilot eased the helicopter backward to keep ground equipment in view. A "bang" was heard, prompting the pilot to disconnect from the long-line and land the helicopter without further incident.
Postaccident Findings
Examination revealed the auger from the semi-truck hopper was fully extended behind the helicopter. The tail rotor blade sustained substantial damage. The pilot suspected backing into the extended auger. No preaccident mechanical failures or malfunctions were reported.