As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6207 - IAD-MHT - MADE AN UNSCHEDULED LANDING DUE TO LEFT GENERATOR FAILURE. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE REMOVED AND REPLACED STARTER/GENERATOR AND PERFORMED GROUND RUNS. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)