As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION FOUND ON THE MAIN CABIN FLOOR SUPPORT UPPER SURFACE AND ATTACHED GUSSET BETWEEN BS 1640 - 1681, BL-0. REMOVED THE CORROSION AND FOUND TO BE WITHIN LIMITS IAW SRM 53-00-51, FIG 101, DETAIL I II, ALLOWABLE DAMAGE 1. REMOVED AND REPLACED THE FLOOR SUPPORT IAW SRM 51-40-02 AND DWG 146N5651.