As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, FLIGHT CREW NOTICED THAT THE AUTOFEATHER ARM LIGHT DIDN`T EXTINGUISH AFTER IT WAS DESELECTED. DECISION WAS TAKEN TO RETURN TO THE DEPARTURE STATION. MX ON SITE REPLACED THE NR2 TORQUE SIGNAL CONDITIONER UNIT (TSCU). ENGINE RUNS WERE COMPLETED AND THE SYSTEM TESTED SERVICEABLE BEFORE RETURNING THE AIRCRAFT INTO SERVICE.