As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON INTERCOSTAL AT STGR 20RH BTW FS310.00 TO FS 319.70 AT MAIN AVIONICS COMPARTMENT INTERNAL STRUCTURE. CORROSION ON INTERCOSTAL AT STGR 20RH BTW FS310.00 TO FS 319.70 AT MAIN AVIONICS COMPARTMENT INTERNAL STRUCTURE WAS REMOVED PER CRJ900 SRM 51-21-06-001-001-A01 OUT LIMITS PER CRJ900 SRM 53-21-23-101-002-A02 AND INTERCOSTAL AT STGR 20RH BTW FS310.00 TO FS 319.70 AT MAIN AVIONICS COMPARTMENT INTERNAL STRUCTURE WAS REPLACED PER CRJ900 SRM 51-42-21-001-001-A01