As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON INTERCOSTAL BTW FS=310 / FS=319 AND STGR 20RH AT FUSELAGE INTERNAL STRUCTURE, BELOW FLOOR. INTERCOSTAL BTW FS=310 / FS=319 AND STGR 20RH AT FUSELAGE INTERNAL STRUCTURE, BELOW FLOOR WAS EVALUATED AND FOUND OUT OF LIMITS PER CRJ-900 SRM 53-21-23-101-002-A02 AND REPLACED PER CRJ-900 SRM 51-42-21-001-001-A01.