Introduction
A helicopter engaged in aerial pesticide application experienced a sudden nose-down pitch and impacted the ground during a flight to a destination field. The accident occurred while the pilot was navigating near an intersection of two roads.
Sequence of Events
The pilot departed from a service truck in a southwest direction, heading toward a field located 2 miles southwest of the truck. While crossing an east/west road, the pilot executed a wide left turn, proceeding northbound. At the intersection of the east/west road and a north/south road, the helicopter maneuvered upward and over power lines that were parallel to the east/west road. Subsequently, the helicopter turned left approximately 90 degrees to the west, followed by another left turn of 90 degrees to the south. During this maneuver, the nose suddenly pitched down, and the helicopter impacted the ground. The wreckage site was located half a block north of the intersection.
Wreckage and Examination
A post-accident examination of the airframe and engine revealed no preimpact anomalies. No specific mechanical or structural failures were identified that could explain the sudden pitch-down event.