What was found
ON GROUND LEFT WING BODY OVERHEAT ILLUMINATED. IN THE APU COMPARTMENT, THE OVERHEAT LOOP ELEMENT IS POSITIONED A FEW INCHES ABOVE THE BLEED AIR SUPPLY DUCT. THIS ELEMENT IS HELD IN POSITION BY NUMEROUS CLAMPS WITH INSULATORS DURING TROUBLESHOOTING, AN INSULATOR WAS FOUND TO BE POSITIONED AS TO WHERE THE ELEMENT WOULD INTERMITTENTLY GIVE A FALSE WARNING DUE TO THE TRANSFER OF HEAT FROM THE SUPPLY DUCT TO THE ELEMENT. THIS OVERHEAT PROBLEM WAS CORRECTED WHEN THE CLAMP INSULATOR WAS REPOSITIONED. (M)