As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF AT FLIGHT LEVEL 500 FT, THE "UP TRIM" WARNING ILLUMINATED ON NR2 ENGINE WHILE THE NR 1 TORQUE INDICATED "0". THE NR 1 ENGINE WAS SHUTDOWN AND SECURED BEFORE THE CREW RETURNED TO THE DEPARTURE POINT WHERE AN UNEVENTFUL SINGLE ENGINE LANDING WAS MADE. THE PROBLEM WAS TRACED BACK TO A COMMUNICATION ISSUE BETWEEN THE ENGINE AUTOFEATHER UNIT AND THE AIRFRAME.