What was found
PILOT REPORTS GRINDING NOISE FROM TAIL ROTOR DRIVESHAFT. REMOVED DRIVESHAFT ASSY AND DISCOVERED ROUGH A041-11 DAMPER BEARING. REPLACED BEARING ASSY. CLOSER EXAMINATION SHOWED PAINT USED DURING DRIVESHAFT ASSEMBLY ON LIP OF SEAL. OVER TIME THIS DAMAGED THE LIP OF THE SEAL AND ALLOWED GREASE TO PURGE FROM BEARING. THIS IS THE SECOND OCCURRENCE OF THIS IN THE PAST 12 MONTHS. MFG NOTIFIED EACH TIME. SUGGEST BETTER QC DURING DRIVESHAFT BUILD UP AT MFG.