Incident Details
While demonstrating a low-level 180-degree autorotation to a rated pilot, the certified flight instructor (CFI) undershot the intended touchdown point. In an attempt to reach the selected touchdown point, the pilot allowed the rotor RPM to decay, causing the aircraft to develop a high sink rate.
Sequence of Events
The pilot then attempted a power recovery but was late with the corrective action. The aircraft contacted the ground and bounced twice before coming to rest on its right side. The aircraft sustained substantial damage during the impact.
Damage
The helicopter received substantial damage. No further details regarding the extent of damage or injuries were provided in the source.