As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SERVICE DOOR THRESHOLD IS CORRODED BEYOND LIMITS ON THE UPPER FLANGE AT FASTENER HOLES, CORROSION EXCEEDS 50% MATERIAL THICKNESS IN SEVERAL SPOTS, REQUIRES REPLACEMENT. C-CHECK RO 12/30/2020. LOCATED AND DRILLED NEW SERVICE DOOR THRESHOLLD PLATE 601R38957-15, IAW CRJ 200 SRM CRJ DWG AND INSTALLED DOME NUTPLATES, IAW CRJ 200 SRM.