While Enroute At An Altitude Of About 2,500 Mean Sea Level… The Propeller RPM Began To Overspeed On April 12, 2026, about 1423 mountain standard time, a Republic RC-3 airplane, N6518K, was substantially damaged when it was involved in an accident near Phoenix, Arizona. The pilot and two passengers were not injured. The amphibious airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that he departed Hangar Haciendas Airport (AZ90) Laveen, Arizona with two passengers onboard for a local flight. While enroute at an altitude of about 2,500 mean sea level, travelling toward Camelback Mountain, the propeller rpm began to overspeed.