As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
*CORROSION FOUND ON INTERCOSTAL AFT OF AVIONICS BAY DOOR ON R/H SIDE OF STGR27. (C CHECK) RO 3/27/2020 REMOVED AND REINSTALLED A NEW INTERCOSTAL AT STRG 27 RH FROM FS.394.00 TO FS.409.00 REF CRJ 200 SRM AND BOMBARDIER DWG. PRESSURE CHECK GOOD. COMPLIED WITH TASK CARD. SEE CONTINUATION FOR FURTHER DETAILS.