As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN FLOORBEAM CORRODED STA 310, RBL 37 TO RBL 41. AFTER CORROSION REMOVAL FOUND T-CHORD TO BE OUT OF LIMITS PER SRM. A PERMANENT REPAIR WAS EXECUTED PER INSTRUCTIONS ON PEMCO PD57-53-121 WITHOUT DEVIATION AND APPROVED BY FAA 8100-9 DATED MAY 6 2011.