As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB #1 ITT GAUGE WENT TO 850 C FOLLOWED BY LOCAL ALERT AND ENGINE CAP ALERT GAUGE THEN ROSE TO 1200 C AND REMAINED ERRATIC FOR 1 TO 2 MINUTES GAUGE SUBSEQUENTLY STABILIZED ON FINAL APPROACH IT BECAME ERRATIC AGAIN. BORESCOPED #1 ENGINE. BORESCOPE CHECKED GOOD. TROUBLESHOT #1 ITT SYSTEM, REMOVED AND REPLACED #1 ITT GAUGE. OPS CHECK GOOD.