As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKE OFF, SMOKE WAS OBSERVED COMING OUT OF FIRST OFFICER’S GLARE SHIELD. AIRCRAFT RETURNED FOR LANDING. FOUND TERMINAL BLOCK AND RING TERMINAL INSULATION FOR CO-PILOT WINDSHIELD LOW HEAT POWER LEAD MELTED AND CRACKED. THE TERMINAL APPEARED TO BE LOOSE CAUSING A HIGH RESISTANCE CONNECTION LEADING TO THE OVERHEATING AND SUBSEQUENT DAMAGE. REPLACED WINDSHIELD AND POWER LEAD RING TERMINAL, ALL OPERATIONAL CHECKS OF HEATING SYSTEM SATISFACTORY.