What was found
CA SIDE WINDOW ARCING NEAR BOTTOM SEAL, JUST ABOVE AND SLIGHTLY LEFT OF ASH TRAY / PERFORMED GVI OF CA SIDE WINDOW IAW CRJ900 AMM 56-11-01-210-801-A01-PSA REV C. FOUND BUBBLING AND DISCOLORATION ON BOTTOM SIDE OF WINDOW, FOUND DAMAGE TO BE OUT OF LIMITS. PERFORMED AIRCRAFT PRESSURIZATION/DEPRESSURIZATION IAW CRJ900 21-31-00-910-801/802, AND OPERATIONAL TEST OF WINDSHIELD/SIDE WINDOW TEMPERATURE CONTROLLER IAW CRJ900 AMM 30-41-06-710-801. COULD NOT DUPLICATE FAULT, NO ARCING OR SPARKING NOTICED AT THIS TIME. FURTHER TROUBLE SHOOTING REQUIRED. REMOVED AND REPLACE LT SIDE WINDOW IAW CRJ7 AMM 56-12-01-000/400-801. REFER TO LOG BOOK PAGE 200822902 FOR LEAK AND OPS CHECK.