CARLOCK - The FAA is expected to investigate an incident involving an ultralight airplane that injured an onlooker during takeoff Wednesday afternoon southeast of Carlock, officials said.

Mitchell Durfeldt, 53, was filming the T-Bird II airplane from the ground when he was struck in the head by one of the plane's tires, police said. Durfeldt, who was apparently knocked unconscious, was taken to BroMenn Regional Medical Center, Normal. He was in serious condition Wednesday night but was no longer listed as a patient Thursday afternoon.

The plane's pilot, Daniel Fasking, 28, of Bloomington, was also taken to BroMenn, but McLean County sheriff's police said he was uninjured.

Police said the incident has been forwarded to the FAA for further investigation. The ultralight plane is large enough - 500 to 600 pounds without fuel - that the FAA is expected to investigate, said FAA spokesman Tony Molinaro.

The plane, manufactured in 1992, is registered to D.M. Fasking of Bloomington. FAA registration information on pilot Daniel Fasking was unavailable due to a privacy request, according to Molinaro.

The incident occurred at 2:50 p.m. Wednesday at 19772 E. 1100 North Road, about four miles southeast of Carlock. Police said Thursday that neither men involved own the property.

The ultralight was in the front farmyard of the rural Carlock residence as sheriff's police investigated the scene.