What was found
(CAN) AFTER DEPARTURE THE CREW RECEIVED A WARNING REGARDING A PROBLEM THE ENGINE THRUST CONTROL SYSTEM. AFTER CONSULTATION WITH MTCE THE CREW ELECTED TO DIVERT BACK TO DEPARTURE. THE FLIGHT RETURNED TO DEPARTURE WITHOUT FURTHER INCIDENT. AIRCRAFT TAKEN OFFLINE AND FLIGHT HAS BEEN CANCELLED. RESOLUTION REPLACED NR 2 ENGINE T3 SENSOR IAW AMM 77-23-10 PB 401. NIL FIX. REPLACED THE NR 2 ENGINE ECU IAW AMM 73-21-60 PB 401. TESTED SERVICABLE AFTER ENGINE GROUND RUN.