As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY STR 23R HAS NUMEROUS AREAS OF CORROSION BETWEEN FS 280.00 AND FS 333.00. C-CHECK RO 10/9/2020. REMOVED AND INSTALLED NEW STR 23R FROM FS 280.00 TO FS 333.00, REF REO BOMBARDIER DRWG CRJ 900 SRM AND SRM. NO LEAKS NOTED. COMPLIED WITH.