What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) On short final to the heliport, the pilot heard and felt a bump in the flight controls. The pilot executed a hovering autorotation onto the heliport. The tail rotor gearbox mounting studs broke and the tail rotor assembly rotated upwards cutting off the vertical fin. It cannot be determined if the tail rotor struck an object on landing.
As the FAA filed it
(-23) ON SHORT FINAL TO THE HELIPORT, THE PILOT HEARD AND FELT A BUMP IN THE FLIGHT CONTROLS. THE PILOT EXECUTED A HOVERING AUTOROTATION ONTO THE HELIPORT. THE TAIL ROTOR GEARBOX MOUNTING STUDS BROKE AND THE TAIL ROTOR ASSEMBLY ROTATED UPWARDS CUTTING OFF THE VERTICAL FIN. IT CANNOT BE DETERMINED IF THE TAIL ROTOR STRUCK AN OBJECT ON LANDING.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.