20120221002769I

The pilot stated that the purpose of the flight was to break in a new engine. The pilot wanted to do a full power take off with the engine completely warmed up so he headed for long island. The pilot circled the area and noted the reef in the middle and the rocks near shore. After landing he taxied back towards the beach. He was checking low idle and remarked to the mechanics that it was exactly where he liked it (the engine RPM). He was in a shallow right turn with all pre-takeoff items completed. For whatever reason he failed to remember the rocks that extended out from shore and ran aground. Once free he got back in the plane thinking there could be minor damage. As the plane listed left he called operations for help knowing the damage was worse than expected. By the time he relayed his position the left wing was in the water and within seconds the aircraft rolled left. The pilot was exiting the plane while the plane rolled upside down. The two mechanics that were also on the plane were already on the right float when the plane rolled. The pilot stated there were no anomalies with the aircraft and the cause rests solely with him taxiing over a sharp reef just below the surface. Note: minor damage was selected due to the fact the NTSB called the damage resulting from the incident was the hole in the float not what the totoal cost of repair was.