What was found
(CAN) THE AIRCRAFT TOOK OFF & JUST AFTER RETRACTING THE LANDING GEAR THE NR 2 ENGINE LOST POWER & UP TRIM OF ENGINE NR 1 WAS COMMANDED. AFTER SOMETIME THE ENGINE NR 2 RECOVERED THE POWER AUTOMATICALLY, WITHOUT ANY PILOT ACTION. AIRCRAFT RETURNED TO DEPARTURE AIRPORT WHERE THE MAINTENANCE CREW REPORTED FAULT CODES 11 & 12. THE EEC & AFU AFU NR 2 WERE REPLACED. AFTER A GROUND RUN THE AIRCRAFT WAS RETURNED TO SERVICE. FDR RAW DATA WAS SENT TO ATR LAST FRIDAY TO BE CONVERTED & ANALYZED.