As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 500 HOUR INSPECTION OF THE MAIN ROTOR COMPONENTS, CORROSION WAS FOUND ON THE MATING SURFACE OF THE SPHERICAL STOP WHERE IT ATTACHES TO THE STARFLEX. ALL THREE SPHERICAL STOPS WERE REPLACED DUE THE FACT THAT THEY ALL HAD 500 HOURS ON THEM AND CHANGING ONLY ONE IS NOT RECOMMENDED.