As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW ADVISED AT FL450 THEY EXPERIENCED A HIGH VIBRATION FROM THE NR 2 ENGINE ACCOMPANIED BY A NR 2 GENERATOR FAILURE, THE CREW FOLLOWED THE CHECKLIST FOR HIGH VIBE WHICH ULTIMATELY RESULTED WITH SHUTTING NR 2 ENGINE DOWN IN FLIGHT AND DECLARING AN EMERGENCY. MX FOUND THE NR 2 STARTER/GENERATOR FAILED AND REPLACED IT.