What was found
THE CREW HAD A BLEED AIR FAIL INDICATION IN FLIGHT, FOLLOWED PROCEDURES AND SHUT THE LT BLEED AIR VALVE OFF AND CONTINUED FLIGHT. UPON INSPECTION AT A MX BASE ,IT WAS FOUND THAT THE EVA TUBING IN THE AREA OF THE DUCT HAD MELTED. THE EVA TUBING WAS REPLACED AND INVESTIGATION INTO WHY THE EVA TUBING MELTED RESULTED IN FINDING THE CRACKED DUCT ASSEMBLY. THE MOUNTING PAD ON THE DUCT AT THE AREA OF THE CRACK IS FOR THE DUCT OVERTEMPERATURE SENSOR MOUNTING. THE OVERTEMP SENSOR WEIGHS A COUPLE OF OUNCES.