On June 7, 2003, at 1139 eastern daylight time, a Cessna 172L, N7149Q, was substantially damaged during landing at Plum Island Airport (2B2), Newburyport, Massachusetts. The certificated private pilot was not injured. Visual meteorological conditions prevailed and no flight plan was filed for the personal flight conducted under 14 CFR Part 91. According to the pilot, he made a left downwind entry to the traffic pattern for runway 10 at Plum Island. He stated that he touched down about 400 feet beyond the runway threshold of the 2,105 foot-long and 50 foot-wide runway. The pilot reported he was "a little hot " during the landing, and as he applied the brakes, he initially received no response from the airplane. The right brake then "took hold" and the airplane veered to the right into the grass. The airplane continued through a fence at the end of the runway. Examination of the airplane by a Federal Aviation Administration (FAA) inspector revealed no mechanical anomalies. Additionally, skid marks were observed on the runway about half way down its length. Weather reported at Lawrence Municipal Airport (LWM), Lawrence, Massachusetts, 13 miles from Plum Island, at 1054, included variable wind at 3 knots, 10 miles visibility, clear skies, temperature 70 degrees Fahrenheit, dew point 60 degrees Fahrenheit, and barometric pressure 29.99 inches Hg.