What was found
DURING TAKEOFF, RUDDER TRIM RAN FULL DEFLECTION IN 1 DIRECTION. PILOT ATTEMPTED TO MANUALLY NEUTRALIZE THE TRIM BUT IT WOULD NOT RUN TOWARDS NEUTRAL. IT IS ELECTRIC. PILOT DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. WERE ABLE TO DUPLICATE THE DISCREPANCY ON THE GROUND. CONNECTED MAINTENANCE INTERFACE BOX AND LAPTOP TO READ FAULTS. THE FAULT WAS IDENTIFIED AS THE TRIM, KTA2810, TRIM ADAPTER UNIT. WHILE TROUBLESHOOTING, THE TRIM BEGAN WORKING PROPERLY. OBTAINED A NEW REPLACEMENT UNIT, REPLACED THE PART, PERFORMED THE FUNCTIONAL CHECKS IAW THE PC-12/47 MM AND FOUND OPERATION TO BE NORMAL. APPROVED ACFT FOR RETURN TO SERVICE.