On November 6, 2003, at 0915 mountain standard time, a Thorne Nieuport 12 experimental biplane, N124TK, veered off of the runway during the landing roll at the Chandler, Arizona, airport. The pilot/owner was operating the flight under the provisions of 14 CFR Part 91. The private pilot was not injured; the airplane sustained substantial damage. The flight departed Chandler about 0900 for the personal, local flight in the pattern. Visual meteorological conditions prevailed, and no flight plan had been filed. In a written statement, the pilot reported that during the landing roll, the airplane began turning to the right. He applied correction to the left; however, the airplane departed the runway. As the airplane traveled back onto the pavement, one of the wheels bent and stopped the forward motion. The airplane then rolled forward and damaged the propeller. The left lower wing was also bent during the accident sequence. The pilot reported no mechanical problems with the airplane.