As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) NR6 CONNECTING ROD RUBBING ON COUNTERWEIGHT. ROD WAS OUT OF ALIGNMENT WITH THE BIG END AND SMALL END AXIS. INSPECTION FOUND THAT THREE COUNTERWEIGHTS HAD MATERIAL GROUND FROM THE BOTTOM SURFACE. THE CRANKCASE WAS ALSO UNSERVICEABLE DUE TO THE BREAKUP OF THE SECOND REAR LT SIDE BEARING SADDLE.