As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FRAME FS313.56 BETWEEN DD4 AND DD5 IS CORRODED. (C-CHECK) RO 2/14/2020 PAX DOOR FRAME FS313.56 BETWEEN DD4 AND DD5 OUT OF LIMITS. REPLACED FRAME REF CRJ900 SRM, AND BOMBARDIER DRAWING. PRESSURE CHECK NOT REQUIRED DUE TO PASSENGER DOOR REPLACED ON CAMP#20407458.