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 CHIP LIGHTS. UPON VISUAL INSPECTION FOUND CAUSE OF METAL DUE TO GALLING T/M AND PTO GEARS. DUE TO T/M JOURNAL SUPPORT STUDS BACKING OUT OF COVER AN UNUSUAL WEAR PATTERN OF SPALLING AND GALLING OCCURRED ON GEAR TEETH. THIS COULD HAVE CAUSED A CATASTROPHIC GEAR FAILURE. ASSURE PROPER INSERTS IN THIS AREA, ALONG WITH PROPER MACHINING AND MESHING OF GEAR TEETH.