What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Pilot was conducting a solo cross country flight for the purpose of meeting the requirements of 14 CFR 61.109(c). Pilot reported hearing a "low-rotor" audio alert, after which he executed an autorotation procedure. The helicopter touched down in a run-on landing after which the skid tips contacted the ground, causing the helicopter to roll, coming to rest in an inverted position.
As the FAA filed it
(-23) PILOT WAS CONDUCTING A SOLO CROSS COUNTRY FLIGHT FOR THE PURPOSE OF MEETING THE REQUIREMENTS OF 14 CFR 61.109(C). PILOT REPORTED HEARING A "LOW-ROTOR" AUDIO ALERT, AFTER WHICH HE EXECUTED AN AUTOROTATION PROCEDURE. THE HELICOPTER TOUCHED DOWN IN A RUN-ON LANDING AFTER WHICH THE SKID TIPS CONTACTED THE GROUND, CAUSING THE HELICOPTER TO ROLL, COMING TO REST IN AN INVERTED POSITION.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.