As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ON APPROACH A STRONG ELECTRICAL/BURNED PLASTIC SMELL WAS REPORTED. CREW TURNED OFF THE RECIRCULATION FANS AND THE SMELL DISSIPATED SOON AFTER THE ACFT LANDED. MX FOUND A LIGHT BALLAST INOPERATIVE AND MEL'D THE SAME. REPLACED BALLAST. LIGHTS OPERATE NORMALLY.