As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LT WINDSHIELD HAD SPARKS AND MELTING GLOW. A LINE FORMED ON WINDSHIELD AND STOPPED WHEN WINDSHIELD HEAT TURNED OFF. CREW RETUNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED, R & R LT WINDSHIELD HEAT CONTROLLER AND PERFORMED CHECKS IAW AMM. ACFT RELEASED FOR SERVICE.