20090530016499A

(-23) During a practice 180 degree autorotation to a power-off touchdown, the aircraft overshot the final approach course to the 2500 foot mown grass private runway. Despite the overshoot, the commercially rated CFI pilot-in-command elected to complete the maneuver, landing instead in an area of rough cut grass six to eight inches high to the right of the runway. The pilot straightened out the helicopter and touched down longitudinally aligned in a run-on landing. The left skid contacted a rut and yawed nose left, resulting in a dynamic rollover of the aircraft onto its right side. Inspection of the area revealed rough earth at the touchdown point, including hardened ruts that there likely the result of a tractor operating in the area when the ground was soft. The main and tail rotors, as well as the tailboom, were destroyed. Addition extensive visible damage includes; the upper fuselage area, mast head, lower engine exhaust cowl, right side fuselage skin, and right hand skid. There was no post-impact fire. The pilot and his passenger, also a commercial rated rotorcraft exhaust cowl, right side fuselage skin, and right hand skid, there was no post-impact fire. The pilot and his passenger, also a commercially rated rotorcraft pilot, were uninjured. Although the PIC is a certified flight instructor in rotorcraft - helicopters, this accident did not occur during an instructional event.