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 STRINGER R22 BTW FS 319-349 AT MAIN AVIONICS COMPARTMENT.(TCI 100-09). "STRINGER 22RH SECTION FS280 TO FS333 AND SECTION FS333 TO FS349 WERE REPLACED FOR A NEW ONES PER CRJ-900 SRM 51-42-06-001-001-A01 AND SRM 51-42-21-001-001-A01. LEVEL CORROSION: 2 "