As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NR 2 DC GENERATING SYSTEM WENT OFF LINE AFTER DEPARTING YFB. THE AIRCAFT RETURNED TO POINT OF DEPARTURE WHERE MAINTENANCE DETERMINED THE NR 2 HALL EFFECT SENSOR HAD FAILED. THE SENSOR WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.