As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIRCRAFT DEPARTED AND SHORTLY AFTER, THE ITT INDICATION STARTED FLUCTUATING BETWEEN 700 AND 300. ALL OTHER ENGINE PARAMETERS WERE WITHIN MANUFACTURER'S SPECIFICATIONS. AIRCRAFT RETURNED TO BASE FOR INSPECTION. PROBLEM WAS FOUND TO BE A LOOSE PIN CONNECTION AT THE BACK OF THE EIS PANEL. PIN WAS SECURED AND AIRCRAFT RETURNED TO SERVICE. (X)