As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COCKPIT CREW REPORTED HEAVY SMOKE AND SPARKS COMING FROM THE CENTER CONSOLE WHILE AT CRUISE. FLIGHT DIVERTED TO AN UNEVENTFUL SAFE LANDING AT GRR. NO FIRE EXTINGUISHER WAS USED AND SOURCE OF THE SMOKE STAYED RESTRICTED TO THE AUTOPILOT CONTROL PANEL LIGHTING. MAINTENANCE AT GRR FOUND THE CONTROL PANEL LIGHT PLATE HAD SHORTED OUT AND REPLACED IT. ALL CHECKS WERE GOOD AND SYSTEM WAS QUALIFIED FOR LLM. AIRCRAFT RETURNED TO SERVICE.