What was found
THE ANTI-ICE DUCT WARNING MESSAGE ILLUMINATED WHEN WING ANTI-ICE WAS SELECTED ON. THE LEFT WING INDICATED OVERHEAT ON THE ANTI-ICE SYNOPTIC PAGE. THE CREW FOLLOWED THE QRH AND MADE AN UNEVENTFUL LANDING AT THEIR DESTINATION. MAINTENANCE REMOVED, INSPECTED, AND REINSTALLED ALL ANTI-ICE PICCOLO TUBES IN THE LEFT WING. NO DISCREPANCIES WERE FOUND. THE ANTI-ICE TEMPERATURE CONTROLLER AND THE LT 14TH STAGE BLEED AIR PRESSURE SWITCH WERE REMOVED AND REPLACED. THE BLEED LEAK DETECTION CONTROL UNITS WERE SWAPPED. THE WING ANTI-ICE SYSTEM LEAK AND OPERATIONALLY CHECKED GOOD. THE AIRCRAFT WAS RELEASED FOR SERVICE.