As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3042 BWI-PHL - LEVELING OFF AT 10,000 FEET, THE CREW HEARD A LOUD BANG. CAPTAIN AND FO NOTICED THE LEFT FRONT WINDSHIELD HAD SHATTERED. WITHIN APPROXIMATELY 10 SECONDS THE W/S HEAT 1 FAIL MESSAGE APPEARED ON EICAS. CREW DECLARED AN EMERGENCY AND RETURNED TO BWI. THE APPROACH AND LANDING WERE UNEVENTFUL. MAINTENANCE REMOVED AND REPLACED CAPTAIN'S WINDSHIELD IAW AMM 56-10-01. OPS CHECK GOOD.