As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMBOUT THROUGH 2000 FT, THE PILOTS NOTICED THE NR 1 ENGINE TORQUE SLIGHTLY ROLL BACK, FOLLOWED BY A LOUD BANG. THE PILOTS PERFORMED THE SHUTDOWN PROCEDURES AND THE ACFT WAS LANDED SAFELY. DURING LANDING, THE REDUCTION GEAR BOX MAGNETIC CHIP DETECTOR ALARM ILLUMINATED. TROUBLESHOOTING IS ONGOING.