As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AIRCRAFT 5639, L/P 1279189) MAIN CABIN FLOOR STRUCTURE STA 1640 BL 0 HAS CORROSION ON UPPER FLANGE OF FLOORBEAM. CORRECTIVE ACTION: OUT OF LIMITS IAW SRM 53-00-51. CUT OUT DAMAGED SECTION IAW SRM 53-00-51 REP 8, FABRICATED AND INSTALLED REPAIR PARTS IAW SRM 53-00-51 REP 8.