As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE NR4 ENGINE T5 INDICTOR SHOWED A SLOW AND CONTINUOUS INCREASE. THE ENGINE WAS SHUTDOWN AND THE AIRCRAFT RETURNED TO BASE. INVESTIGATION SHOWED THE GAUGE WAS INDICATING APPROXIMATELY 250 DEGREES HIGH. THE UNIT WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.