On November 26, 1993, approximately 0820 Pacific standard time (PST), a Hiller UH-12D helicopter, N59366, collided with a power line near Sublimity, Oregon. The commercial pilot was not injured, but the helicopter sustained substantial damage. The FAR Part 133 external load flight, which was operating in visual meteorological conditions, was hauling Christmas trees to a nearby truck at the time of the accident. No flight plan had been filed, and there was no report of an ELT activation. According to the pilot, who had already picked up one load of trees, he inadvertently allowed the main rotor to contact some unseen wires while lifting off with his second load. The pilot said that he had looked the area over from the air prior to picking up the first load, but he did not notice the wires he ultimately contacted.