As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT INCURRED VIBRATION IN-FLIGHT CAUSING DEVIATION TO NEAREST AIRPORT. UPON INVESTIGATION, FOUND LEFT STARTER/GENERATOR BEARING DETERIORATED. STARTER/GENERATOR HAD LATEST BEARING INSTALLED SB 23080-XXX-24-01. REPLACED STARTER/GENERATOR WITH OVERHAULED UNIT. OPS CHECK GOOD.