As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"INITIAL INSPECTION : CORROSION ON FRAME FS364 FWD ATTACHED FLANGE BTWSTGR 26RH TO 27 AT MAIN AVIONICS COMPARTMENT ( E/E ) (TCI 100-09) "COMPLETE: SUMMARY: ON NRC: 00166, CORROSION LEVEL 2. FRAME FS364 BTW STGR 26RH TO 27 AT MAIN AVIONICS COMPARTMENT WAS REPAIRED PER CRJ-900 EA CRJ953-09927 REV. IR