What was found
(CAN) DURING INSPECTION IT WAS FOUND THAT THE ELECTRICAL CONNECTER AND APPROX 3 INCH OF WIRE FORWARD OF THE VANISTER. IN THE PROP DE-ICE CCT WAS BURNED AND THE WIRE HAD BECOME SEPARATED FROM THE VANISTON LEAVING THE PROP DE-ICE SYSTEM IN-ACTIVE. FLIGHT CREW WAS UNAWARE OF ANY INOPERATIVE SYSTEMS. WIRING WAS REPAIRED AND CONNECTOR REPLACED, SYSTEM FUNCTION TESTED NORMAL. SUBMITTER SUSPECTS/CONNECTOR WIRE HAD WORKED LOOSE OVER TIME CAUSING ARCING/BURNING WITH WIRE FINALLY FELL OFF. (TC NR 20081222005)