As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) RT ENGINE NR 1, NR 2 AND NR 3 CONNECTING ROD BIG END BEARINGS WORN. INVESTIGATION FOUND THE STARTER ADAPTER WORM GEAR NEEDLE ROLLER BEARING HAD FAILED CONTAMINATING THE OIL SYSTEM AND PARTIALLY BLOCKING OIL SUPPLY TO THE CONNECTING ROD BIG END BEARINGS.