As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE INTERCOSTAL THAT IS BETWEEN FS 295 AND FS 310 AND ABOVE STRINGER 17L, HAS CORROSION ON ITS INBOARD FLANGE BEHIND THE ANCHOR FITTING. C-CHECK RO 10/4/2020. REMOVED AND REPLACED INERCOSTAL BETWEEN FS 295 AND FS 310 ABOVE STR 17L, REF CRJ200 SRM AND DWG. SEE CONTINUE CARD FOR DETAILS. COMPLIED WITH ATTACHED TASK.