As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIRCRAFT HAD CLIMBED TO FL 230 WITH THE WINDSHIELD HEAT ON. SHORTLY AFTER THE HEAT WAS TURNED OFF A LOUD BANG WAS HEARD AND THE LT WINDSHIELD SHATTERED INTO A RIVER OF LATTICE-LIKE CRACKS ON THE INNER LAMINATIONS. WINDSHIELD HAD BEEN INSTALLED 18 MONTHS PREVIOUS.