As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ACFT DISPATCHED UNDER MEL WITH CAPTAINS WINDSHIELD HEAT INOPERATIVE. WINDSHIELD HEAT APPEARED TO BE WORKING NORMALLY DURING CLIMB. PASSING FL245 FOR FL250 THERE WAS A LOUD BANG AND CAPTAINS WINDSHIELD SHATTERED. CREW MADE AN EMERGENCY DESCENT, PAN CALLED. ACFT LANDED WITHOUT FURTHER INCIDENT. PILOT`S WINDSHIELD REPLACED.