What was found
IND - FLT 797 - AT CRUISE ALTITUDE, CAPTAINS WINDSHIELD BEGAN ARCING. WINDSHIELD HEAT WAS TURNED OFF. SHORTLY THEREAFTER, THE CAPTAINS WINDSHIELD CRACKED. A DECISION WAS MADE TO DIVERT TO IND. FLIGHT LANDED WITHOUT FURTHER INCIDENT WITH NO EMERGENCY BEING DECLARED. MAINTENANCE REMOVED AND REPLACED THE CAPTAINS L1 WINDSHIELD. ALSO, REPLACED L1 WINDSHIELD HEAT CONTROLLER (P/N 83000-05602) AS PRECAUTIONARY. OPERATIONAL CHECK GOOD. (M)