As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE FLIGHT NR 3 ENGINE GENERATOR INDICATED UNDER EXCITATION FOLLOWED BY UNDER VOLTAGE THEN A FIELD TRIP. THE RESIDUAL VOLTAGE WAS BELOW MINIMUM AS SUCH THE CSD WAS DISCONNECTED AND THE ELECTRICAL BUSS LOADS WERE REDUCED. THE GENERATOR WAS FOUND TO HAVE A FAILED INPUT SHAFT. THE GENERATOR WAS REPLACED AND AIRCRAFT RETURNED TO SERVICE.