What was found
CAPTAIN'S SIDE WINDOW FAILED DURING FLIGHT. CREW BROUGHT AIRCRAFT DOWN TO NEAREST SUITABLE AIRPORT, KDAY. WILL BE SWAPPING AIRCRAFT TO AIRCRAFT 591 TO CONTINUE TO KFNT. / LEFT SIDE WINDSHIELD HEAT ARCING AND CAUSED WINDSHIELD TO CRACK. / REMOVED LH SIDE WINDOW IAW CRJ 900 AMM 56-12-01-000-801-A01. INSTALLED LH SIDE WINDOW IAW CRJ 900 AMM 56-12-01-400-801-A01-PSA, OPS AND LEAK CHECK GOOD. REMOVED AND REPLACED LH SIDE WINDOW HEAT CONTROLLER IAW CRJ 900-AMM 30-41-06-400-801. OPS CHECK GOOD."