What happened
The pilot was conducting aerial application operations on a large agricultural field that featured a power line running along its northern boundary. During the initial two passes over the target area, the spray equipment experienced intermittent malfunctions, though the aircraft remained airborne.
On the fourth pass, the pilot approached the field from the north. As the aircraft neared the power line infrastructure, it struck the upper cable of the transmission line. The impact caused the aircraft to lose control and crash into the field itself.
The investigation
Post-accident interviews with the pilot and a witness revealed that environmental conditions were challenging. Winds in the area were variable, and there was evidence of whirlwind activity near the ground. These turbulent air currents likely contributed to the difficulty in maintaining precise altitude and position during the low-level agricultural operation.
Findings
The collision with the power line occurred during a routine crop dusting run. The combination of mechanical issues with the spray system on earlier passes and the unstable weather conditions created a hazardous environment for the pilot. The variable winds and localized whirlwinds reduced the pilot's ability to maintain safe clearance from the overhead infrastructure.
Safety message
Pilots conducting agricultural operations near power lines must remain vigilant regarding changing wind patterns. Turbulence and whirlwinds can significantly affect aircraft handling at low altitudes, requiring constant adjustment of flight path and altitude to avoid obstacles.