As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT NR 1 AND NR 3 MAIN GENERATORS ON LT ENGINE WERE NOT SHARING THE LOAD AND THERE WERE 50 AMP SPLIT BETWEEN THE 2 GENERATORS. IT WAS OBSERVED BOTH ON THE GROUND AND DURING IN FLIGHT. TROUBLESHOT BY SWAPPING GENERATOR CONTROL UNIT, GCU AND GENERATORS AND FOUND NR 3 GENERATOR WAS FAULTY. REPLACED THE MAIN GENERATOR AND OPS CHECK GOOD. ACFT WAS RETURNED TO SERVICE. THE FAULTY GENERATOR, PN 30086-011, SN 99581 WAS O/H.