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 - BS500D LBL22 WL156.<[01] REMOVED AND REPLACED FLOOR TO SIDEWALL SUPPORT AT FCB BS400-500D LBL22;WL156;IAW SRM 51-40-02.;[02] UPDATED PARTS USAGE;[03] VERIFIED CORRECTIVE ACTION. <BR><BR>VERIFIED MEASUREMENTS.