As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMB, A LOUD RUMBLE WAS FOLLOWED BY ACFT YAW WITH NR 1 ENGINE TEMPERATURE GOING INTO THE RED BAND AND TORQUE FLUCTUATING. THE PILOT ELECTED TO SHUT THE ENGINE DOWN BEFORE RETURNING TO THE DEPARTURE POINT WHERE AN UNEVENTFUL SINGLE ENGINE LANDING WAS MADE. TROUBLESHOOTING IS ON-GOING.