As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK INSPECTION MAINTENANCE FOUND THE CENTER FLOORBEAM AT FRAME 59 HAS LEVEL 2 CORROSION. MAINTENANCE REMOVED THE CORROSION FROM THE CENTER FLOORBEAM AT FRAME 59 AND REPAIRED THE CENTER FLOORBEAM AT FRAME 59 IAW ETD 2011-145-104686.