As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) NR 5 CYLINDER BASE STUDS FAILED ALLOWING CYLINDER TO SEPARATE FROM THE CRANKCASE. THE CYLINDER REMAINED ATTACHED TO THE ENGINE BY INTAKE AND EXHAUST PIPES. THE PISTON OIL SCRAPERRING CAME OUT OF THE CYLINDER BARREL AT THE BOTTOM OF THE PISTON STROKE AND BROKE.