As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) COMPONENT REMOVED FOR METAL CONTAMINATION. DURING DISASSEMBLY FOR INVESTIGATION BEARING LOCK FOUND BROKEN INTO MULTIPLE FRAGMENTS. THIS CAUSED EXTENSIVE DAMAGE TO EPICYCLIC AND REDUCTION GEARBOX ASSEMBLIES. POSSSIBLE CAUSE IS INCORRECT BEARING PRELOAD DURING ASSEMBLY.