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 BS400 - BS420 RBL24 WL156. MARKED<[01] UPDATED STEP 2 WITH CALIBRATED TOOLING USED;[02] VERIFIED;[03] REMOVED AND REPLACED FCB LH FWD FLOOR TO SIDEWALL SUPPORT IAW BOEING DWG 14A7501; 143A7500 AND SRM 51-40-02;[04] VERIFIED CORRECTIVE ACTION #3