As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL ARC OCCURRED AT THE BOTTOM OF THE LEFT FORWARD WINDOW DURING CRUISE. CREW TURNED OFF WINDOW HEAT. SUBSEQUENTLY WINDOW SHATTERED REMAINING IN ONE PIECE. REPLACED NUMBER 1 LEFT WINDSHIELD ASSEMBLY AS OUTLINED IN MM 56-11-01. ADDITIONALLY DUE TO WINDOW FAILURE AND SUBSEQUENT REPLACEMENT, REPLACED LEFT FORWARD WINDOW HEAT CONTROLLER M191 AS OUTLINED IN MM 30-41-01.