As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) UPON RECEIPT OF TRANSMISSION FROM OVERHAUL, THE LT INPUT PINION BEVEL GEAR TEETH WERE FOUND DAMAGED. SUBMITTER STATED CAUSE OF DAMAGE IS NOT YET KNOWN, BUT COULD BE SPALLING AS A RESULT OF OVERLOADING, CORROSION, OR METAL DEFECT.