Organizers say 69-year-old Carl Enlow died after being hit by the rotor Friday night at the Bloomsburg Fair.
The fair's superintendent of police and parking says the helicopter was refueling when Enlow went back to speak to the pilot who relieved him. Bill Barratt says Enlow's hat blew off his head and he was struck by the rotor when he reached for it.
Barratt says Enlow was an experience pilot had been flown helicopters in the military.
Montour County Coroner Scott Lynn tells the Bloomsburg Press-Enterprise the Birdsboro man's death is under investigation. He did not immediately return a phone message from The Associated Press.