As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FLIGHT LEVAL 390, CREW FELT A VIBRATION IN THE AIRCRAFT, AIRCRAFT DIVERTED. MAINTENANCE FOUND LEFT ENGINE STARTER GENERATOR DESTROYED. GENERATOR WAS REPLACED, GROUND CHECK NORMAL. THE GENERATOR CARRIES A TBO OF 1000 HOURS. THIS TIME IS RARELY ACHIEVED.