Accident Overview
A helicopter conducting an agricultural spraying operation crashed after its main rotor blade contacted a power line. According to the operator, the flight's purpose was to defoliate vegetation near power lines by applying chemicals. The loader of the chemicals reported observing smoke near the spraying area around the time the helicopter was due to return for refueling, and subsequently called 911 to report the crash.
Investigation Findings
Examination of the accident site revealed that one of the main rotor blades had struck a power line located 97 feet above ground level. After the contact, the helicopter descended, impacting the ground in a nose-low attitude, and then rolled onto its right side before coming to rest. Cockpit damage was noted from the main rotor blades.
Airframe and Engine Examination
Inspection of the airframe and engine showed no evidence of preimpact failure or malfunction. No witnesses to the accident were identified.
Probable Cause
The investigation determined that the accident resulted from the main rotor blade contacting a power line.