The National Transportation Safety Board will investigate the crash of a small plane that went down near the Doylestown Airport shortly after taking off.

The homebuilt aircraft crashed around 11:45 a.m., authorities said, when it struck power lines and became entangled in them.

The crash happened on the southwest side of the Route 611 bypass where it crosses Route 313, also known as West Swamp Road.

The plane had only the pilot aboard when it struck the power lines, regional Federal Aviation Administration spokesman Jim Peters said, based on results of a preliminary investigation.

The craft was a single-pilot, single-engine, fixed-wing Wilson Cri-cri, also known as a "cricket," Peters said. Officials learned Saturday it was homebuilt, he said.

The pilot, who was not identified, was taken to Temple University Hospital with burns, Bucks County spokesman Chris Edwards said. His condition was not immediately available.

After taking off, the plane turned southwest and struck the power lines, Peters said. Airport officials declined to comment.

The tail section remained in the wires, according to Charlie Metzger, a spokesman for the Pennsylvania Department of Transportation; the rest of the plane broke off and fell to the ground.

The Route 611 bypass was closed to northbound traffic in the area for several hours, Metzger said.

An FAA investigator from the Philadelphia district office conducted a preliminary inquiry before the accident was referred to the National Transportation Safety Board for further investigation.