As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR MID INTERCOSTAL DD1 HAS CORROSION (C-CHECK) RO 2/14/2020 PAX DOOR MID INTERCOSTAL DD1 OUT OF LIMITS. REPLACED INTERCOSTAL REF CRJ900 SRM AND CRJ900 SRM AND BOMBARDIER DRAWING. PRESSURE CHECK NOT REQUIRED DUE TO PASSENGER DOOR REPLACED ON CAMP#20407458.