Accident Sequence
The owner of the helicopter, who did not hold a pilot certificate, reported that he followed the manufacturer's checklist and started the helicopter as he awaited the arrival of his pilot. According to his account, as the main rotor reached "idle speed," the helicopter spun to the right and subsequently rolled over.
Damage
The rollover resulted in substantial damage to the main rotor drive shaft and tail boom. The owner did not report any mechanical malfunctions or failures with the helicopter that would have precluded normal operation.
Additional Information
The owner's pilot did not witness the accident and did not authorize the owner's actions. No other details about the helicopter, location, or date were provided in the initial report.