As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 2C CHECK FOUND UPPER SURFACE OF FLOORBEAM FS 280.00 CORRODED BETWEEN LBL 18.00 AND RBL 27.00. AND THE BOTTOM SIDE IS CORRODED JUST INBOARD OF RBL 18.00. THE AIRCRAFT WAS REMOVED FROM SERVICE. INSTALLED FLOORBEAM AT FS 280 IAW SRM 51-42-06 AND 51-42-13. THE AIRCRAFT WAS RETURNED TO SERVICE.