As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE DOING A 500 HOUR (T)INSPECTION IT WAS NOTED THAT THE RUBBER WAS DELAMINATING ON TWO OUT OF THE THREE SPHERICAL THRUST BEARINGS. CRACKING APPEARS TO BE BETWEEN THE RUBBER AND THE METAL PIECE INBOARD SIDE OF SPHERICAL STOP. THE RUBBER APPEARED WET ALL THE TIME SO AS PER MM INSPECTION CRITERIA IT WAS FOUND THAT THE DELAMINATION WAS BEYOND LIMITS. WITH ONLY 52.7 HOURS ON THE UNITS IT WAS DISCOURAGING.