What was found
(CAN) DURING CLIMB, HARD BURN PLASTIC WAS SMELLED BY PILOTS. AFTER A WHILE UNPLEASANT EYE PINCH STARTED. AFTER SWITCHING OFF OF THOSE TWO SWITCHES SMELL DISAPPEARED. CREW DECIDED TO PERFORM AN ATB. NO EMERGENCY WAS DECLARED AS THE SITUATION WAS BETTER DURING DESCENT. MAINTENANCE FOUND DAMAGED `BURNED` GROUND WIRE ON COCKPIT LT SIDE WINDOW. REPLACED LT SIDE WINDOW, IAW AMM TASKS 56-10-06000/400-801 REV 61. NORMAL OPERATION CONFIRMED. NO FURTHER SMELL. INCIDENT REPORTED TO MANUFACTURER ON 20-JUL-2018. (TC# 20180723014)