As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON INTERCOSTAL BTW FS310 TO FS319 AND STGR 20RH SIDE ON INTERNAL FUSELAGE STRTUCTURE. DUE TO EXCESIVE DAMAGE INTERCOSTAL BTW FS310 TO FS319 AND STGR 20RH IS OUT OF LIMITS PER CRJ-900 SRM 53-21-23-101-002-A02 THEREFORE WAS REPLACED PER CRJ900 SRM 51-42-21-001-001-A01.