As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY STR 27 CORRODED BETWEEN FS305.00 AND FS333.00 (C-CHECK RO 7/28/2021) REPLACED MAIN AVIONICS BAY STR 27 BETWEEN FS305 AND FS333 REF DWG SH670-31630 REV. K, CRJ900 SRM 51-42-06-001-001-A01, AND CRJ900 SRM 51-42-21-001-001-A01. CHECKS GOOD. COMPLIED WITH 51-900-1002-SKY.