On November 21, 2002, approximately 1030 central standard time, a Ramsay Lancair IV-P, experimental homebuilt single-engine airplane, N222MR, exited runway 30 and struck a fence while landing at the Kestrel Airpark Airport, near Bulverde, Texas. The airplane was owned and operated by the pilot under 14 Code of Federal Regulations (CFR) Part 91. The commercial pilot, and the pilot rated passenger were not injured, and the airplane sustained substantial damage. Visual meteorological conditions prevailed for the cross-country flight, and a flight plan was not filed. The personal flight departed Mobile, Alabama, approximately 0830. The FAA inspector, who responded to the accident site, found tire marks approximately 2,300 feet beyond the approach end of the 3,000-foot runway 30. The airplane departed the runway, traveled for 450 feet, struck 2 runway lights, a ditch, and a fence before coming to rest. The left wing was found partially separated from the airplane, and the left wing spar was twisted. The propeller, nose gear, and right main gear were damaged. The pilot reported to the FAA inspector that during his third attempt to land the aiplane, the left brake of the differential brake system failed during the landing roll. The FAA inspector examined the brake system and found no discrepancies.