As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON INBD FLANGE OF LBL9 BETWEEN FS409.00 +128 AND FS424.00 (C-CHECK) RO 2/9/2021 BLENDED CORROSION ON THE LBL9 FS409+128 - FS424 FLOORBEAM SECTION "OUT OF LIMITS." REF CRJ200 SRM 53-41-43, DRAWING 601R31118 REV L. SEE JOB 2757661 OP/430, MX TRANS #22150523 FOR CORRECTIVE ACTION