What was found
(CAN) DURING CLIMB AFTER T/O, THE ENGINE TORQUE INDICATION FLUCTUATED 3 TIMES BEFORE DROPPING TO ZERO. THE PILOT SELECTED MAX CONTINUOUS POWER SETTING AND THE TORQUE RETURNED TO NORMAL.HE ELECTED NONETHELESS TO RETURN TO THE ORIGIN POINT WHERE AN UNEVENTFUL LANDING WAS MADE. POST FLIGHT INSPECTION FOUND SLIGHTLY LOOSE HIGH SPEED COMPRESSOR SPEED SENSOR CONNECTORS.TROUBLESHOOTING IS ON-GOING.