As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BACKUP SILL STGR 21L, FS310.00 TO FS333.00 HAS EVIDENCE OF CORROSION (C-CHECK RO 7/20/2021) REMOVED AND REPLACED WITH NEW BACK-UP SILL STGR 21L, FS310.00 TO FS333.00 HAS EVIDENCE OF CORROSION REF CRJ-700 SRM 51-42-06-001-001-A01 & BOMBARDIER DWG SH670-31810 REV Y.PRESURE LEAK CHECK GOOD. COMPLIED WITH 51-900-1002-SKY.