As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FROM BOS TO CAE CREW EXPERIENCED EXCESSIVE RT ENGINE VIBRATION. AN EMERGENCY WAS DECLARED WITH ATC AND FLIGHT DIVERTED TO IAD. FLIGHT LANDED IN IAD WITHOUT FURTHER INCIDENT. MAINTENANCE PERSONNEL REMOVED AND REPLACE RT ENGINE, MAF FLIGHT WAS SATISFACTORY AND AIRCRAFT WAS RELEASED FOR RETURN TO SERVICE.