As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, THE FLIGHT CREW REDUCED THE POWER LEVERS TO IDLE. NOTICED THAT THE ENGINE PITCH NOISE CHANGED CONSIDERABLY. THE MASTER CAUTION LIGHT CAME ON WITH AN (ENG LO OIL PRESS) LIGHT. THE CREW FOLLOWED THE CHECKLIST FOR AN ENGINE FAILURE OR ENGINE SHUTDOWN IN FLIGHT, AND SHUT THE ENGINE DOWN. DECLARED AN EMERGENCY AND CONTINUED WITHOUT FURTHER INCIDENT.