On May 8, 2007, about 1425 central daylight time, a single-engine Cessna 210 airplane, N9461, was substantially damaged while landing at the Southland Field Airport (UXL), near Sulphur, Louisiana. The flight instructor, the private pilot receiving instruction, and the passenger were not injured. The airplane was registered to Smooth Air LLC., and was being operated by the pilot. Visual meteorological conditions prevailed and no flight plan was filed for the 14 Code of Federal Regulations Part 91 instructional flight. The local flight originated from UXL at 1230. According to statements provided by the 63-year old pilot and flight instructor, upon their return from the "practice area" the pilot performed one touch-and-go and then proceeded around the traffic pattern for a second landing. Before touchdown the pilot and instructor reportedly verified the landing gear was extended by performing a visual check via a mirror mounted on the wing and also by observing the illuminated green landing gear light. Shortly after touchdown the right landing gear gave way and the right wing began to descend. The pilot attempted to "go-around" by applying full engine power. The pilot reported that the airplane "would not fly" and slid to a stop in grass near the runway. According to photographs provided to the NTSB investigator-in-charge (IIC), the airplane's right wing and right aileron sustained structural damage. The left main landing gear remained down and locked and was not affected. The reason for the reported collapsed of the right main landing gear could not be determined. At 1420, the weather observation facility at UXL reported, wind from 120 degrees at 5 knots, visibility 7 statute miles, clear of clouds, broken ceiling at 4,800 feet, temperature 82 degrees Fahrenheit, dew point 78 degrees Fahrenheit, and a barometric pressure of 30.06 inches of Mercury.