As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN FWD FLOOR SUPPORT BETWEEN BS 365 AND 377, RBL 55 HAS CORROSION ON UPPER SURFACE. REMOVED THE CORROSION AND FOUND TO BE OUT OF LIMITS IAW SRM 53 -00-51-101, DAMAGE 1. REMOVED AND REPLACED THE FLOOR SUPPORT IAW SRM 51-40-02, PARA 7, AND DWG 141N5160.