What was found
WHEN COCKPIT CREW TURNED ON THE WINSHIELD ANTI-FOG SWITCH, WHILE AT CRUISE, A SHOWER OF SPARKS SHOT OUT OF THE UPPER EDGE OF FIRST OFFICER'S FORWARD FACING WINDOW. THE CREW PULLED CIRCUIT BREAKER X26 10592. MAINTENANCE PERFORMED A VISUAL INSPECTION OF FIRST OFFICER'S WINDSCREEN AND FOUND THAT THE ANTI-FOG SENSOR RING TERMINALS WERE MISSING INSULATION AND MAKING CONTACT WITH EACH OTHER. RETERMINATED SENSOR WIRES PER B717 SWPM 20-20-01, PERFORMED OPERATIONAL CHECK OF WINDOW ANTI-FOG AND HEAT SYSTEM IAW B717 AMM 30-42-01. ALL CHECKS WERE GOOD. REFER TO LOG PAGE #0884126 FOR NO-GO ODI PREVENTION. NO OTHER DAMAGE NOTED. AC OK FOR SERVICE. (LP #7236638)