As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT LANDED AIRCRAFT AFTER T/R CHIP LIGHT CAUTION LIGHT ILLUMINATED. TAIL ROTOR CHIP DETECTOR WAS INSPECTED. A LARGE AMOUNT OF METAL ACCUMULATION WAS EVIDENT. TAIL ROTOR GEARBOX WAS REMOVED AND REPLACED AND SENT FOR EVALUATION. UPON TEARDOWN INSPECTION, ONE TOOTH ON INPUT DRIVE GEAR WAS FOUND BROKEN. FURTHER INVESTIGATION IS IN PROGRESS.