As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY DOOR SURROUND STRUCTURE, INTERCOSTAL BETWEEN FS349 AND FS364 AT STGR 27L CORRODED. LOCATED AND DRILLED NEW INTERCOSTAL STR 27L BETWEEN FS 349 TO FS 364, P/N SH670-32075-3S, IAW CRJ-900 SRM 51-40-11-001-001-A01 INSTALLED NEW INTERCOSTAL P/N SH670-32075-3S STR 27L BETWEEN FS 349 TO FS 364, IAW CRJ-900 SRM 51-42-06-001-001-A01 AND 51-42-21-001-001-A01