On May 24, 2006, about 0730 mountain standard time, a conventional gear Cessna 152, N6136B, ground looped on landing at Buckeye Municipal Airport, Buckeye, Arizona. The owner was operating the airplane under the provisions of 14 CFR Part 91. The commercial pilot and one passenger were not injured; the airplane sustained substantial damage. The local personal flight departed Buckeye Municipal Airport about 0630. Visual meteorological conditions prevailed, and no flight plan had been filed. The pilot submitted a written report in which he said that he was practicing touch-and-go takeoffs and landings to familiarize himself with the conventional gear conversion airplane. He also indicated that he was flying early in the morning due to the calm wind conditions. After completing several wheel landings he began practicing three-point landings. He said that upon touchdown he lost control of the airplane and it ground looped. The right main landing gear broke as a result of the ground loop and the airplane skidded to a stop. The pilot stated that the airplane and engine had no mechanical failures or malfunctions during the flight.