As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"AWR. IN REF EO R25120 AFTER INSULATION REMOVAL, CORROSION WAS FOUND ON INTERCOSTAL STRG L21 BTW FS 310-349 AT MAIN AVIONICS COMPARTMENT.(TCI 100-09). "CORROSION LEVEL 2 INTERCOSTAL STRG L21 BTW FS 310-333 WAS REPLACED FOR A NEW ONE PER CRJ-900 SRM 51-42-06-001-001-A01 PAR 6C AND CRJ-900 SRM 51-42-20-001-001-A01 PAR 6C AND CORROSION ON INTERCOSTAL STRG L21 BTW FS 333-349 WAS REMOVED PER CRJ-900 SRM 51-21-06-001-001-A01 PAR 5B, B