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 237 BETWEEN BL 0-LBL 22 FLOOR SUPPORT CHAFED. BLENDED AREA AND FOUND TO BE OUT OF LIMITS IAW SRM 53-01-1. REMOVED FLOOR SUPPORT IAW SRM 51-30-05. FABRICATED AND DRILLED HOLES IAW SRM 51-10-4 AND DWG 5914617. INSTALLED FLOOR SUPPORT IAW SRM 51-30-05.