What was found
DURING FLIGHT, WINDOW HEAT LT SIDE OVERHEAT LIGHT TURNED ON FOR 5 MIN THEN BACK OFF. NORMAL UNTIL LANDING THEN OVERHEAT LIGHT AGAIN. ACFT GROUNDED. FOUND COIN LAYING ACROSS LT SIDE WINDOW TERMINAL. SWAPPED SENSOR WIRES NO HELP. WHC SHOWS A SENSOR FAULT REF WDM 30-41-12. VERIFIED NEW WINDOW RESISTANCE AT 59.8 OHMS (H16) AND TB5016 AT TERMINAL NR 1. AFTER 5 MINS, OVERHEAT LIGHT ON. REPLACED WINDOW HEAT CONTROL UNIT IAW AMM TASK 30-41-11-000-801 & 30-41-11-400-801. OP CHECKED NORMAL WITH NEW WINDOW INSTALLED. REPLACED LT SLIDING WINDOW IAW AMM 56-12-11/ 401.