What was found
(CAN) ADVANCING POWER LEVERS ON TAKEOFF, FLIGHT CREW NOTICED THAT THE AUTOFEATHER SYSTEM DIDN`T ARM THEN THE PROPELLER NR 1 FEATHERED AUTOMATICALLY AT AROUND 50 KNOTS. THE TAKEOFF ROLL WAS REJECTED AND THE ACFT RETURNED TO THE GATE. FLIGHT CREW CONFIRMED THAT THE AUTOFEATHER SYSTEM WOULD NOT TEST. A MAINTENANCE TEAM TRAVELLED TO THE OUTSTATION AND FOUND THE NR 1 TORQUE SIGNAL CONDITIONING UNIT (TSCU) AT FAULT. FLIGHT DATA RECORDER REVEALED THE PROPELLER SUSTAINED AN OVERTORQUE. THE TSCU AND NR 1 PROPELLER ASSY WERE REPLACED, TESTED SERVICEABLE AND THE ACFT RELEASED INTO SERVICE.