What was found
LEFT SIDE WINDOW HEAT "OVERHEAT" LIGHT ILLUMINATED TWICE IN FLIGHT. GROUNDED - YES. CHECKED & RELEASED LT "SIDE" SLIDER WINDOW HEAT PER MEL 30-11E. ETOPS "A/C HAS HISTORY". PERFORMED HISTORY BITE TEST OF LT NR 2 WHCU AND FOUND WINDOW SENSOR FAULTS PER FIM 30-41 TASK 801. CHANGED TERMINAL LUG ON WINDOW HEAT SENSOR FROM PRIMARY TO SPARE AND PERFORMED GOOD RESISTANCE CHECK PER AMM 30-41-21-760-801. PERFORMED GOOD OPS TEST OF LT NR 2 WINDOW HEAT PER AMM 30-41-00-710-801. THIS CLEARS MEL 30-11E.