What was found
PILOT REPORTED THAT ON DESCENT NO2 TORQUE GAUGE STUCK AT 76%, (BOTH ANALOG AND DIGITAL), WITH POWER LEVER MOVEMENT TORQ WAS UP AND DOWN, BOTH POWER LEVERS WERE RETARDED, (NR 1 TORQUE MAX 151), THE NO 1 PROP INADVERTANTLY FEATHERED, PERFORMED EMERGENCY MEMORY ITEMS ON QRC FOR INADVERTANT PROP FEATHERING, IMMEDIATELY AFTER TURNING AUTO FEATHER OFF, NO2 TORQ GAUGE DROPPED TO 33%, DETERMINED ENGINE PARAMETERS WERE NORMAL, NORMAL LANDING. MAINTENANCE FOUND NR 2 AUTOFEATHER TEST SWITCH STICKS IN TEST POSITION, CLEANED SWITCH WITH ELECTRICAL CONTACT CLEANER IAW AIM 12.10.0, PERFORMED AUTOFEATHER OPERATIONAL TEST IAW EMB-120 MM 61-23-20, SECTIONS 4 AND 5, OPERATIONAL TEST GOOD.