As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON FRAME, LOCATED BTW FS=1015.00 AND STGR 25LH TO 25RH AT REAR FUSELAGE INTERNAL STRUCTURE, BELOW FLOOR. FRAME, LOCATED BTW FS=1015.00 AND STGR 25LH TO 25RH AT REAR FUSELAGE INTERNAL STRUCTURE, BELOW FLOOR WAS REPAIRED PER CRJ-900 SRM 53-00-06-201-001-A03