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 FROM FS280.00 TO FS302.00 CORRODED ON FWD END ATTACH FLANGE AND WEB (C CHECK RO 12-31-21) REPLACED MAIN AVIONICS BAY STR 27 FROM FS280.00 TO FS302.00 REF CRJ900 SRM 51-42-06-001-001-A01, CRJ900 SRM 51-42-21-001-001-A01, DWG SH670-31630 REV. K. COMPLIED WITH TASK CARD 51-900-1002-SKY. LEAK CHECK GOOD.