What was found
PILOTS REPORTED VIBRATIONS IN THE CYCLIC, UPON INSPECTION IT WAS FOUND THAT ONE OF THE MAIN ROTOR BLADES HAD BRINELLED SPINDLE BEARINGS
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PILOTS REPORTED VIBRATIONS IN THE CYCLIC, UPON INSPECTION IT WAS FOUND THAT ONE OF THE MAIN ROTOR BLADES HAD BRINELLED SPINDLE BEARINGS