As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, BACK GROUND LIGHT FOR STAB TRIM STARTED SMOKING. THEN LIGHTS OFF, REPOSITIONED BACK GROUND PANEL STOPPED SMOKING BUT HALF THE LIGHTS WERE INOP. MAINTENANCE REMOVED AND REPLACED STAB TRIM LIGHT PANEL PER ALL APPLICABLE MANUALS AND OPERATIONAL CHECK WAS GOOD. AIRCRAFT WAS RETURNED TO SERVICE.