Event Summary
A pilot reported that the helicopter experienced a complete engine shutdown while on base leg, describing it as "like turning a switch off." The pilot initiated an autorotation and had to bleed off rotor energy to clear trees. After clearing the trees, the pilot saw abandoned power lines and believed the bottom of the skid contacted them. The helicopter touched down in a plowed field and subsequently rolled over.
Fuel History
According to the pilot, the helicopter had been placed at Triad for a 50-hour inspection and was reportedly defueled to a dry tank. Six days later, a fuel truck log indicated that the aircraft was refueled with 23.2 gallons as a payback. The owner and Triad furnished information that the helicopter was operated for a total of 1 hour and 25 minutes at various power settings.
Post-Accident Inspection
After the accident, the pilot did not visually check the fuel but reported seeing no leaks. An FAA inspector added 5 gallons of fuel to the dry tanks and ran the engine for about 30 seconds. The engine was shut down due to a crack in a fuel line, which was crimped. The inspector indicated that the crimp was impact damage.
Further Details
The pilot stated that while on base leg the engine shut off abruptly. During the autorotation, tree clearance was necessary. The pilot observed abandoned power lines after clearing the trees and thought the skid might have hit them. The landing occurred in a plowed field, resulting in a rollover.