As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON DISASSEMBLY AND INSPECTION OF PARTS DUE TO METAL CONTAMINATION. PINION GEAR HAS EXCESSIVE GALLING ON GEAR TEETH DUE TO IMPROPER MACHINING AND MESHING WITH T/M GEAR. BOTH PARTS WERE SCRAPPED AND SENT FOR WARRANTY CREDIT. ASSURE PROPER MACHINING AND MESHING OF GEAR TEETH.