What was found
(CAN) SUBSEQUENT TO TAKEOFF, THE FLIGHT CREW POSITIONED ENGINES FROM TAKEOFF MODE TO CLIMB SETTINGS. UPON THE INITIAL TRANSIENT POWER CHANGE, FLIGHT OBSERVED NR 1 ENGINE TORQUE INDICATION WENT TO "ZERO" WITH A SLIGHT POWER CHANGE. THE FLIGHT CREW ELECTED TO SHUTDOWN AND SECURE NR 1 ENGINE AND RETURN TO DEPARTURE WHERE AN UNEVENTFUL LANDING TOOK PLACE. INVESTIGATION ON-GOING.