As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON INTERCOSTAL ATTACHED TO STRINGER 20RH IN STA. FS= 310 TO FS= 319.70 WAS FOUND. CORROSION REMOVED PER CRJ900 SRM 51-21-06-001-001-A01; WAS EVALUATED PER CRJ900 SRM 53-21-23-101-002-A02 AND WAS REPLACED PER CRJ900 SRM 51-42-21-001-001-A01