As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH, CREW REPORTED SMOKE EMANATING FROM THE INSTRUMENT PANEL, WITH AN ELECTRICAL BURNING SMELL. CREW DECLARED AN EMERGENCY, CONTINUED THE APPROACH TO A SAFE LANDING. MX FOUND THE DIMMER POWER SUPPLY (DS104) OUTPUT VOLTAGE OUT OF LIMITS WHICH RESULTED IN BURNING UP THE ALTITUDE AWARENESS PANEL. BOTH COMPONENTS WERE REPLACED.