As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW INFLIGHT T1477/25 PLUME OF HIGH SPEED SMOKE, SPARKS, AND SMOKE BLEW FROM LOWER LEFTHAND CORNER, FL310, OF CAPTAINS WINDSHIELD. WINDSHIELD CRACKED. RETURNED TO DFW. LANDED WITHOUT INCIDENT. REPLACED CAPTAINS WINDSHIELD AND WINDSHIELD HEAT CONTROLLER AS PRECAUTION. SYSTEM GROUND CHECKED NORMAL OPERATION.