As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) UPON FURTHER INVESTIGATION INTO WHY ENGINE WAS MAKING METAL, IT WAS FOUND THAT TWO TEETH HAD FRAGMENTED OFF THE GEAR. THE TEETH FRAGMENTS WERE .6250 INCH LONG AND WERE FOUND TRAPPED IN THE INTERNAL OIL SCREEN. THE CAUSE FOR THE GEAR FAILURE WAS NOT EVIDENT. AS SPECIFIED BY THE SUBMITTER AND IAW THE ENGINE MANUAL, THIS ENGINE COULD HAVE REMAINED IN SERVICE.