As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(SUPPORT TASK) MAIN CABIN SECTION 41 FLOOR STRUCTURE STA 312 FLOORBEAM CORRODED ON UPPER SURFACE OF UPPER FLANGE AT LBL11. TRANSCRIBED FROM HAECO GSO NRC 9284773. CORROSION FOUND TO BE OUT OF LIMITS PER ECRA 5321-01330 REV B. REPAIRED FLOORBEAM IAW B737-800 SRM 53-10-51-2R-17.