What was found
WINDOW ARCING, FLIGHT DIVERTED. CREW REPORTED CAPT FWD WINDSHIELD (L1) BEGAN TO ARC AND DISCOLOR INTERNALLY, WINDOW HEAT TURNED OFF OUTER PANE THEN CRACKED. SMOKE OR ELECTRICAL ODOR REPORTED. NO CB'S REPORTED POPPED. PER LOCAL MECHANIC FOUND BLACK WIRE AT TERMINAL BLOCK LOCATIONS J2 AND J3 ON BOTH L1 AND R2 WINDSHIELDS, TERMINAL BLOCK LOCATIONS J1, J4 AND J5 ON BOTH L1 AND R1 WINDSHIELDS. ALL INSTALLED TERMINAL BLOCKS, BOTH POWER AND SENSOR ARE WALLACE BLACK. REPLACED WINDOW PER MM. REPLACED WINDOW HEAT CONTROLLER. TAG REMOVED WINDOW WITH AN ENGINEERING ALERT TAG.