As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AWR HIDDEN DISCREPANCY: AFTER FLOOR PANEL SUPPORT ANGLE REMOVAL CORROSION WAS FOUND ON FLOOR BEAM STA 280 BTW BL0.00 AND LBL 11 AT PAX CABIN (W1) IN REF NRC S/N 00159. SUMMARY: ON NRC. 00264 CORROSION LEVEL 2, CROSSBEAM AT FS 280.00 BTW BL 0 TO LBL 42 WAS REPLACED PER CRJ/900 SRM 51-42-06-001-001-A01, 51-42-13-001-001-A01 AND 51-42-20-001-001-A01