As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOTS COMPLAINED ABOUT HEAVY COLLECTIVE AND EXCESSIVE AMOUNT OF RT COLLECTIVE INPUT TO FLY. UPON INSPECTION OF THE LAMIFLEX BEARINGS, IT WAS DISCOVERED THAT THE RUBBER AND BRASS MATERIAL WAS EXTRUDING AND DELAMINATING. UNABLE TO DETERMINE CAUSE. USEFUL LIFE IS RATED AT FIVE YEARS, AND THESE HAD 25 MONTHS TIME IN SERVICE WHEN REMOVED.