As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN REMOVING THE INTERIOR FOR A PHASE INSPECTION, TECHNICIANS NOTICED THE CRACKED SEAT BASE UPON REMOVAL. NUT WAS OBVIOUSLY OVERTORQUED. IF THERE WERE BUSHINGS INSIDE THE SEAT FRAME TUBES THIS MIGHT NOT HAVE HAPPENED OR IT LARGE AREA WASHERS WERE INSTALLED IT MAY PREVENT THIS. PHOTOS ATTACHED.