As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION FOUND ON PAX DOOR INNER SKIN AT MULTIPLE LOCATIONS DURING REMOVAL OF STAIR ASSEMBLY (C-CHECK) RO 2/14/2020 PAX DOOR INNER SKIN HAD 100% MATERIAL LOSS AT MULTIPLE LOCATIONS DUE TO EXFOLIATION, INNER SKIN WAS OUT OF LIMITS. REMOVED AND REPLACED THE PAX DOOR INNER SKIN, REF CRJ 700 SRM, & BOMBARDIER DWG. SEE CONTINUATION CARD FOR DETAILS