What was found
IN CRUISE FLIGHT, 4 MINUTES FROM LANDING, THE TORQUE INDICATOR WENT BLANK, 1 MINUTE LATER THE PILOT COULD SMELL PLASTIC BURNING IN THE COCKPIT. THE PILOT LANDED AND NOTIFIED MAINTENANCE. MECHANIC REMOVED AND REPLACED THE TORQUE GAUGE AND AC WAS RETURNED TO SERVICE, UPON COMPLETION OF THE OPERATIONAL CHECK. (K)