As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR DD1A INTERCOSTAL P/N 601R318066-1 HAS CORROSION ON LWR SIDE OF INNER SKIN ATTACH FLANGE AND WEB (MARKED) (C-CHECK RO 6/22/2021) DD1A INTERCOSTAL FOUND TO BE OUT OF LIMITS REF. CRJ-900 SRM, 52-11-06-001-001-A01. REMOVED AND REPLACED WITH NEW INTERCOSTAL REF. CRJ-900 SRM, 51-42-06-001-001-A01 AND DWG 601R31702 REV-N. COMPLIED WITH TASK CARD 51-900-1002-SKY, PRESSURE CHECKS GOOD.