As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE PIC NOTICED TORQUE FLUCTUATIONS AND LOSS OF TORQUE. A VIBRATION WAS NOTICED. THE PIC SHUT DOWN THE NR 1 ENGINE IN FLIGHT, DECLARED AN EMERGENCY AND DIVERTED TO MBJ AND LANDED. THE A/C WAS DETERMINED TO BE DOWN FOR AN ENGINE CHANGE.