What was found
AFTER GEAR RETRACTION,NR 2 ENGINE TORQUE FLUCTUATED TO 125 PERCENT FOR 1 TO 2 SECONDS THEN RETURNED TO TAKEOFF SETTING OF 97 PERCENT. THE SAME FLUCTUATIONS OCCURRED 3 TIMES WITHIN A PERIOD OF 30 SECONDS. THE POWER UPTRIM LIGHT CYCLED THEN THE NR 2 ENGINE POWER SURGED. ABOUT 1 MINUTE AFTER TAKEOFF, THE NR 2 ENGINE POWER DROPPED SUDDENLY FOR SEVERAL SECONDS THEN POWER RETURNED TO THE ENGINE. NO AUTOFEATHER OCCURRED TO THE NR 2 ENGINE. POWER WAS REDUCED ON BOTH ENGINES AND AIRCRAFT RETURNED TO FIELD. INSPECTED NR 1 AND NR 2 ENGINES, TSEU, MFC, TQ, EEC CANNON PLUGS, NO DISCREPANCIES WERE FOUND. REPLACED TORQUE MONITOR SENSOR ON NR 1 ENGINE, OPERATIONAL CHECKS GOOD.