As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE CAME INTO SHOP FOR METAL IN OIL. UPON DISASSEMBLY TORQUE METER GEAR, P/N 23035299, S/N NN505263 PRIMARY FAILED PART. PINION GEAR P/N 6889700 S/N KU507731 SECONDARY FAILED PART FOR SOURCE OF MIO. BOTH GEARS SCRAPPED DUE TO WEAR WITH A TT IN SERVICE OF 871.2 HOURS.