LEBANON, N.H. (AP) -Federal authorities are investigating the death of a business owner at Lebanon Airport.

Details are sketchy, but police said Bart Miller, 49, of Norwich, Vt., was killed in his company hangar Monday morning in an accident involving a forklift.

Miller loved to fly and had built a hanger for his fledgling business, Interstate Aircraft Co., designing and building bush planes.

He was working on the Arctic Tern, a plane he had designed for short-distance landings on the type of runways typically found in the wilderness: dirt roads, woodland clearings and gravel bars, said airport manager Steve Miller. The two Millers are unrelated.

Miller was in the last stages of getting Federal Aviation Administration approval for the plane, Steve Miller said.

The area director of the Occupational Safety and Health Administration said the office is investigating the accident.

He was survived by his wife and two sons.