As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE FLIGHT CREW REPORTED THAT THEY LOST THE NR 2 AC ALTERNATOR. THE SYSTEM WAS SECURED AND THE FLIGHT CONTINUED. TROUBLESHOT AND DETERMINED THAT THE NR 2 AC ALTERNATOR GCU HAD FAILED . THE GCU WAS REPLACED. RETURNED TO SERVICE.