As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR INTERCOSTAL IS CORRODED. "3RD FROM THE TOP" FLAGGED. C-CHECK RO 12/05/2020. REMOVED AND INSTALLED NEW PAX DOOR MID DD6 INTERCOSTAL (P/N:601R318057-1S), REF CRJ-200 SRM AND BOMBARDIER DWG. COMPLIED WITH TASK CARD. PRESSURIZATION LEAK CHECK SATISFACTORY.