As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6409 - PWM-IAD - DURING CRUISE DIVERTED TO BOS DUE TO THE LEFT GENERATOR FALLING OFF LINE FOLLOWED BY ENGINE VIBRATION. THE ENGINE WAS NOT SHUT DOWN. AN EMERGENCY WAS DECLARED AND AIRCRAFT LANDED AT BOS WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED THE LEFT STARTER GENERATOR. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)