As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HIDDEN DISCREPANCY: AFTER FLOOR PANEL SUPPORT ANGLE REMOVAL, CORROSION ON CROSSBEAM FS 280.00 AND LBL 12 WAS FOUND. IN REF NRC S/N 00285. (W1)
CORROSION LEVEL 2. CROSSBEAM FS 280.00 AND LBL 0 TO 46 WAS REPLACED PER CRJ900 SRM 51-42-21-001-001-A01 PAR. 6.C AND CRJ900 SRM 51-42-06-001 -001-A01 PAR 6.C.