As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO DOOR LOWER SILL AT FS 1031.00 HAS LIGGHT SURFACE CORROSION ON OUTER SURFACE REQUIRES CLEANING AND EVALUATION (C-CHECK RO 8/19/2021) REMOVED CORRODED AFT CARGO DOOR LOWER SILL PN MM670-35655-003 AND REPLACED WITH NEW AFT CARGO DOOR LOWER SILL PN MM670-35655-003 IAW CRJ700 SRM 53-61-23, 51-42-06, 51-42-13 AND 51-42-21.