As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 4567 - BNA - DURING CRUISE FLIGHT, THE RIGHT ENGINE TORQUE DROPPED TO 20 PERCENT AND THE RPM ROSE TO 120 PERCENT. THE CREW SHUT DOWN THE RIGHT ENGINE, DECLARED AN EMERGENCY AND RETURNED TO BNA WITHOUT INCIDENT. REPLACED ENGINE. (M)