As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW NOTICED A VIBRATION IN CRUISE. IDENTIFIED ELECTRICAL POWER LOSS IN RT STARTER/GENERATOR. I SOLATED STARTER/GENERATOR. NO FURTHER PROBLEMS EXPERIENCED DURING THE FLIGHT. RESEARCH REVEALED THE STARTER/GENERATOR, O/H, HAD THE SAME FAILURE PRIOR TO BEING OVERHAULED. BECAUSE OF THE CALENDAR TIME, IT WASN'T POSSIBLE TO TRACE THE COMPONENT HISTORY OF THE BEARINGS, VENDOR, ETC. STARTER/GENERATOR RETURNED FOR FURTHER EVALUATION.