What was found
WHILE BEGINNING DECENT AT ABOUT 30000 WE NEEDED WINGS AND COWLS FOR AI SO WE TURNED THEM ON. WE THEN RECEIVED THE A/I WING X FLOW CAUTION MESSAGE. AFTER TURNING ON THE XFLOW THE MESSAGE. TURNED TO WHITE AND WE EXITED AND AVOIDED ICING CONDITIONS. CORRECTIVE ACTION: REMOVED DEFECTIVE WING CROSSFLOW VALVE AND INSTALLED SERVICEABLE VALVE, PERFORMED OPS AND LEAK CHECK IAW CE680AS MM30-10-10. OPS CHECKS GOOD, PN ON AND OFF 9914552-3 SN ON 1509C SN OFF 1604C.