As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH, NOTICED SPARKS ON THE BOTTOM OF THE LEFT SIDE WINDOW, THEN A MINUTE LATER RECEIVED A L WINDOW HEAT CAUTION MESSAGE ACCOMPANIED BY 2 NOTICEABLE CRACKS INSIDE THE SIDE WINDOW. (FLIGHT 4910 - FILED OPEN) THIS IS CURRENTLY A WORK IN PROGRESS