As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE WAS REMOVED DUE TO MAKING METAL. UPON DISASSEMBLY AND INSPECTION OF PARTS, FOUND T/M GEAR TEETH RADIUS ROUGH AND UNFINISHED MACHINING CAUSING PINION GEAR TO GALL. IMPROPER AND UNFINISHED MACHINING OF T/M GEAR CAUSING PINION GEAR TEETH TO GALL. ASSURE PROPER MACHINING AT FACTORY.