As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON FLOOR TO SIDEWALL SUPPORT AT FCB BS500A - BS500D RBL23 WL156. MARKED<[01] REMOVED AND REPLACED FLOOR TO SIDEWALL SUPPORT AT FCB (ZEE CHANNEL) BETWEEN BS 500A - BS.500D RBL21 WL 156 IAW B-737-700 SRM 51-40-02 AND DWG# 143A7500;[02] VERIFIED CORRECTIVE ACTION 1