As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON A 5 MILE FINAL WITH AN RJ IN TRAIL BY 3 MILES, PULLED POWER BACK TO IDLE. RIGHT ENGINE MADE A POPPING NOISE AND STARTED FLUCTUATING IN TORQUE. P USHED BOTH POWER LEVERS UP TO SEE IF THE TORQUE WOULD STABILIZE, THAT FAILED , DECIDED TO SECURE THE RIGHT ENGINE. DECLARED AN EMERGENCY AND LANDED. NO OTHER ISSUES ENCOUNTERED.