On July 23, 1999, a Robinson R22 (registration N2313D) was involved in an aviation accident near Spring Green, WI. Investigators recorded the probable cause as: The pilot's failure to maintain clearance from power lines during low-altitude agricultural operations. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 8 related events involving the same aircraft type or operator are linked below.
A helicopter struck power lines while pollinating a cornfield, resulting in a crash. The pilot reported making turns near the wires before impact, and post-accident inspection found no mechanical issues with the aircraft.
What happened
The accident occurred while a helicopter was engaged in agricultural operations, specifically pollinating a cornfield. According to a written statement provided by the pilot, he had completed approximately three to four turns near power lines located at the eastern end of the field before colliding with one of the wires. Following the impact, the helicopter fell to the ground and struck the terrain.
The investigation
A post-accident examination of the helicopter was conducted to determine if mechanical failure contributed to the incident. The inspection revealed no preexisting anomalies or defects in the aircraft that would have caused the accident.
Probable cause
The pilot's failure to maintain clearance from power lines during low-altitude agricultural operations.