As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED TAIL ROTOR GEARBOX AFTER REPAIR. DURING RECEIVING INSPECTION CORROSION NR CORROSION PITTING WAS NOTED ON THE OUTPUT SHAFT IN SEVERAL AREAS ALONG THE SHAFT. THIS IS A NO DAMAGE AREA AS DEFINED O/H MANUAL, MRV 34, 65.20.20.820. THE GEARBOX WAS REJECTED AND PLACED BACK INTO SUPPLY AWAITING DISPOSITION.