As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN`S WINDSHIELD ANTI-ICE FAILED. LEFT WINDSHIELD HEAT ECAM MESSAGE ILLUMINATED APPROXIMATELY 40 MINUTES AFTER TAKEOFF. DECLARED EMERGENCY AND RETURNED TO DEPARTURE. THE AIRCRAFT WAS GROUNDED. REPLACED LEFT WINDSHIELD IAW JC 33L21056001. SYSTEM OK FOR SERVICE.