As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) NR 2 PISTON PIN PLUG WORN AWAY. PLUG HAD WORN INTO THE PISTON OIL RING LAND. THE ENGINE WAS INSPECTED AND ALL OTHER PISTON PIN PLUGS WERE FOUND WITH VARIOUS DEGREES OF WEAR. THE ENGINE HAD BEEN FITTED WITH NEW CYLINDER KITS IN APRIL 1998.