As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING C CHECK, ONE RUB BLOCK (P/N 69-31604-4) WAS FOUND LOOSE ON THE LOWER BEAM. AFTER REMOVAL OF THE BLOCK, IT WAS FOUND THAT THE LOWER BEAM WAS WORN OUT OF LIMIT AT THE PLACE WHERE THE RUB BLOCK WAS INSTALLED. THE LOWER BEAM HAS TO BE REPLACED.