As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
[ IN REFERENCE NRC S/N 144 ] INITIAL INSPECTION: CORROSION ON FLOOR SUPPORT IN STA. FS= 280 BETWEEN STRG 26LH TO 26RH AT MAIN AVIONICS COMPARTMENT. (E/E) [ TASK 900-53-140-300 APPENDIX A ] TCI: 100-09, 100-09E4, 100-09E5 SUMMARY: LEVEL CORROSION 2. FLOOR SUPPORT IN STA. FS= 280 BETWEEN STRG 26LH TO 26RH AT MAIN AVIONICS COMPARTMENT WAS REPLACED PER CRJ 900/SRM 51-42-06-001-001-A01 PAR. 6 AND CRJ 900/SRM 51-42-20-001-001-A01 PAR. 6