What was found
(CAN) ENGINE NR 1 ANALOG TORQUE DROPPED DURING INITIAL TAKEOFF ROLL. THE TAKEOFF WAS ABORTED AND UNABLE TO CONFIRM IF UNCOMMANDED AUTOFEATHER TOOK PLACE. ENGINE NR 1 AUTOFEATHER UNIT AND AUTOMATIC TAKEOFF POWER CONTROL SYSTEM, ATPCS, WERE ISOLATED IAW MINIMUM EQUIPMENT LIST, MEL FOR DISPATCH. QUICK ACCESS RECORDER, QAR, READOUT ALREADY REQUESTED TO CUSTOMER TO CONFIRM THE EVENT.