As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR DD6 INTERCOSTAL (P/N 601R3180571) HAS CORROSION. C-CHECK RO 10/29/2020. FOUND PAX DOOR INTERCOSTAL DD6 TO BE OUT OF LIMITS, AS PER CRJ 200 SRM. REMOVED AND INSTALLED A NEW PAX DOOR INTERCOSTAL DD6, REF CRJ 200 SRM AND DWG. COMPLIED WITH TASK CARD. PERFORMED PRESSURE CHECK, REF CRJ 200 AMM PRESSURE CHECK GOOD. SEE CONTINUATION FOR FURTHER DETAILS.