As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT ROTOR HEAD WAS IN SHOP FOR A SCHEDULED CENTER ROTOR HUB REPLACEMENT. DURING DISASSEMBLY, HORIZONTAL PIN LOCKING BEAM FOUND TO BE CRACKED. RESEARCH REVEALS THE CRACKED LOCKING BEAM TO BE AN OUTLIER. REPLACED AND COMPONENT RETURNED TO SERVICE.