As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN CRUISE FLIGHT, THE PILOT NOTICED SPARKS COMING FROM THE LEFT ENGINE FORWARD COWL AREA. AS A PRECAUTION, THE ENGINE WAS SHUTDOWN AND SECURED. THE AIRCRAFT THEN MADE AN UNEVENTFUL LANDING. UPON INVESTIGATION, IT WAS DISCOVERED THAT THE ALTERNATOR OUT SENSOR SHORTED INTERNALLY AND HAD BURNED A HOLE THROUGH THE END OF IT'S CASE. THE SENSOR WAS REPLACED AND AN OPS CHECK PROVED SATISFACTORY.