As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR INTERCOSTAL DD4 IS CORRODED BETWEEN FS 320 AND FS 338. C-CHECK RO 10/13/2020. REPLACED INTERCOSTAL DD4, IAW CRJ 200 SRM. COMPLETED TASK CARD AND ATTACHED COMPLETED FORM 337. NO WEIGHT CHANGE, REFERENCE CONTINUATION FOR WORK PERFORMED.