As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DORR FRAME F/S 313.56 AND CLEAT BETWEEN INTERCOSTAL DD4 AND DD5 HAS CORROSION. (C-CHECK) RO 3/6/2020 REPLACED PAX DOOR FRAME AT FS313.56 AND CLEAT BETWEEN INTERCOSTAL DD4 AND DD5 WITH NEW, REF CRJ-900 SRM AND BOMBARDIER DWG. COMPLIED WITH TASK CARD. NO LEAKS NOTED.