As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY FS319.70 FRAME CORRODED BETWEEN STR 25L AND STR 26R (C-CHECK RO 7/28/2021) REPLACED MAIN AVIONICS BAY FS319.7 FRAME BETWEEN STR 21L AND STR 23R REF CRJ900 SRM 51-42-06-001-001-A01 AND DWG SH670-31630 REV. K. CHECKS GOOD. COMPLIED WITH 51-900-1002-SKY.