As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) ENGINE CYLINDER BORES EXCESSIVELY WORN IN TOP AND BOTTOM AREAS OF THE CYLINDER. PISTON RING CAUGHT IN WORN GROOVE CAUSING IT TO BREAK. ENGINE HAS CHROMED CYLINDERS INSTALLED AND IT IS SUSPECTED THAT THE ENGINE WAS OPERATING WITHOUT ADEQUATE LUBRICATION.