What was found
SJK - DURING C-CHECK INSPECTION, TWO WING SKIN SUPPORTS ON RIB 19, AND ONE SKIN SUPPORT ON RIB 20 OF THE LEFT WING WERE FOUND TO BE CRACKED. MAINTENANCE REMOVED AND REPLACED THE AFFECTED SKIN SUPPORTS IN ACCORDANCE WITH EMB-120 SRM 57-20-07, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.