As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE IN THE CLIMB, CREW REPORTED AN UNCOMMANDED RT ENGINE OVERSPEED. AIRCRAFT RETURNED TO DEPARTURE STATION. TROUBLESHOOTING TRACED FAULT TO AN OPEN CIRCUIT IN THE RT ENGINE STATOR-ALTERNATOR. STATOR-ALTERNATOR REPLACED. ENGINE OVERSPEED INSPECTIONS COMPLETED SATISFACTORY. IPC REF 73-21-07-01-040A.