As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT-BUF - FLT 825 - DURING CRUISE THE FLIGHT CREW NOTICED VIBRATION FROM THE LEFT ENGINE. THE CREW REDUCED THE POWER TO IDLE, AND THE ENGINE STAYED WITHIN NORMAL PARAMETERS. THE AIRCRAFT THEN DIVERTED TO PIT AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE ENGINE. (M)