As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STGR21L INTERCOSTAL IS CORRODED BETWEEN FS310 AND FS333. (C-CHECK RO 9/30/2021) REMOVED DAMAGED INTERCOSTAL AND INSTALLED A NEW INTERCOSTAL IAW CRJ 700 SRM 51-42-06-001-001-A01. TASK CARD 51-900-1002-SKY AND M-337 ATTACHED WITH NO CHANGE TO WEIGHT