As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY STR 21R HAS MULTIPLE AREAS OF CORROSION BETWEEN FS333.00 AND FS379.00 (C-CHECK RO 6/22/2021) REPLACED STR 21R FROM FS333 - FS379. REF CRJ900 SRM 51-42-06-001-001-A01, REF CRJ900 SRM 51-42-21-001-001-A01AND DWG SH690-31350 REV M. COMPLIED WITH TASK CARD 51-900-1002-SKY. NO LEAKS NOTED.