What was found
RT FWD WINDOW ARCED IN UPPER LT CORNER AND BEGAN TO GLOW. TURNED OFF WINDOW HEAT. THE OUTER PANEL SHATTERED. RETURNED TO BASE, R & R RT FWD WINDOW IAW MM 56-11, PERFORMED INITIAL TORQUE, AND SECOND TORQUE IAW AMM 56-11 IAW AMM 56-11. DUE TO RT FWD WINDOW ARCHING AND SHATTERING. WINDOW HEAT CONTROLLER REPLACEMENT IS NECESSARY. R & R RT FWD WINDOW HEAT CONTROLLER UNIT IAW AMM 30-41-01, CHECKED GOOD.