As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERCOSTAL AT STGR 20L CORRODED BETWEEN FS 319.70 AND FS 349.00 (C-CHECK) RO 2/17/2021. REPLACED THE INTERCOSTAL AT STGR 21L BETWEEN FS 319.70 TO FS 349.00 IAW CRJ 200 SRM 51-40-11, 51-42-06, 51-42-21. REFERENCE ATTACHED CONTINUATION CARD FOR WORK PERFORMED.