As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 2260713) DURING INSPECTION FOUND CORROSION ON FLOORBEAM STA 947 FROM RBL 3 TO RBL 50 AT AFT CABIN FLOOR STRUCTURE CPAX. FLOORBEAM STA 947 FROM RBL 3 TO RBL 50 AT AFT CABIN FLOOR STRUCTURE CPAX WAS REPAIRED PER ER/A 599594-14 REV:ORIGINAL AND B737-800 SRM 53-70-51-2R REP 5.