As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON REMOVAL OF RED AND YELLOW STAR-FLEX ASSEMBLY, ONE BUSHING WAS FOUND UNSCREWED FROM THE UPPER ARM. THE CAUSE MAY BE EITHER A POOR BOND OF BUSHING TO STAR-FLEX ARM OR A POOR CLEANING OF BOLT PRIOR TO USE OF NEW MASTONOX AT LAST BEARING CHANGE. SUBMITTER STATED TO ALWAYS CLEAN AND INSPECT PARTS PRIOR TO RE-USE.