As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE REMOVED FOR METAL IN OIL. UPON DISASSEMBLY OF GEARBOX, HELICAL POWER TRAIN PINION GEAR PN 6893672 WAS FOUND TO HAVE SPALLING ON GEAR TEETH. HELICAL TORQUEMETER GEAR ALSO HAD SPALLING ON GEAR TEETH. BOTH PARTS WERE REJECTED DUE TO SPALLING. PINION GEAR FAILED AT LOW TOTAL TIME IN SERVICE. 632.5 HRS. TORQUEMETER GEAR HAD 5,000 PLUS HRS IN SERVICE. ENGINE REPLACED. (X)