What was found
DURING CLIMBOUT, ENROUTE, OPERATING UNDER A PART 91, THE PILOT NOTICED AN ITT SPLIT OF AROUND 70 DEGREES BETWEEN THE LT & RT ENGINES, LT BEING ABNORMALLY HIGH. THE PILOT RETARDED THE LT ENGINE AND SHUTDOWN. ACFT DIVERTED. EVIDENCE WAS FOUND OF AN OVERHEAT IN THE LT PYLON AREA. ON CLOSER INSPECTION IT WAS FOUND THAT THE LT BLEED AIR PRE-COOLER IN THE PYLON HAD RUPTURED.