As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON FUSELAGE INTERNAL STRUCTURE ANTENNA DOUBLER BTW FS295.00 / FS310.00 AND STGR 26L / STGR26R AT MAIN AVIONICS COMPARTMENT. CORROSION ON FUSELAGE INTERNAL STRUCTURE ANTENNA DOUBLER BTW FS 295.00 / 310.00 AND STGR26L / STGR 26R AT MAIN AVIONICS COMPARTMENT WAS REMOVED AND EVALUATED OUT OF LIMITS PER CRJ900 SRM 51-21-06-001-001-A01 AND ANTENNA DOUBLER WAS REPLACED PER CRJ900 51-42-06-001-001-A01