As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERTED DUE TO VIBRATION NOTICED FOLLOWED BY A "GEN 1 OFF BUS" CAS. NR 1 ENGINE WAS THEN SHUT DOWN IAW CHECKLIST. AIRCRAFT LANDED WITHOUT INCIDENT. R&R STARTER/GEN AND COMPLIED WITH 05-50-02 UNSCHEDULED STARTER/GEN REMOVAL INSP WITH NO DEFECTS NOTED.