As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"INITIAL INSPECTION: CORROSION ON INTERCOSTAL (2EAS) BTW FS=349 / FS=364 AND STGR 26LH / 26RH AT INTERNAL STRUCTURE OF MAIN AVIONICS COMPARTMENT (SM) (E/E) (TCI:53-20-305). " "SUMMARY: ON NRC. 00275 CORROSION LEVEL 2. INTERCOSTAL (2EAS) BTW FS=349 / FS=364 AND STGR 26LH / 26RH AT INTERNAL STRUCTURE OF MAIN AVIONICS COMPARTMENT WERE REPLACED PER CRJ-900 SRM 51-42-21-001-001-A01 AND SRM 51-42-06-001-001-A01 " SH670-32075-3