As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING M-CHECK, FOUND MAIN PASSENGER CABIN STA 200, LBL 22-BL 0 FLOOR PANEL SUPPORT HAS CORROSION. REMOVED CORROSION FROM FLOOR SUPPORT. FOUND TO BE OUT OF LIMITS IAW SRM 53-01 FIG 1. FABRICATED NEW FLOOR SUPPORT AND INSTALLED IAW SRM 51-30-5.