Incident Overview
A helicopter certificated in the restricted category for aerial applications was involved in an accident following a water rinsing procedure. The pilot had completed several aerial application flights, including a water rinsing flight. After that flight, the pilot's brother, who had been performing flagging duties, boarded the helicopter.
Accident Sequence
During the subsequent flight, the spray boom struck the ground. The helicopter then collided with terrain. Upon coming to rest, the helicopter erupted into flames.
Wreckage Examination
Postaccident examination of the wreckage disclosed no evidence of any preimpact airframe or engine malfunctions or failures.