As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR MID INTERCOSTAL DD3 P/N: 601R318056-1 HAS CORROSION. (C-CHECK) RO 3/6/2020 REPLACED PAX DOOR MID INTERCOSTAL DD3 AND CLIP WITH NEW INTERCOSTAL / CLIP REF CRJ-900 SRM AND BOMBARDIER DWG. COMPLIED WITH TASK CARD. NO LEAKS NOTED.