What was found
FS 280 AT 9:00 INCH BL LT AND RT; INBD AND OTBD BRACKETS WHICH ATTACH CABIN SEAT RAIL BEAMS TO THE 280 FS ARE CRACKED TOTAL 4, DISCOVERED DURING C-CHECK INSPECTION. INSTALLED NEW BRACKETS; PN 601R31113-57 (2 EA) AND 601R3113-58 (2 EA) IAW CRJ200 SRM 51-42-21 PARA 5-10 & SRM 51-42-13 PARA 6-8. REFERENCE REO 601R-53-11-137 REV NC; REO 601R-53-11-138 REV NC; AND STANDARD REPAIR 601R-53-0057A.