What was found
L3 WINDOW HEAT EICAS MESSAGE. TROUBLE SHOT IAW FIM 31-41-00, FAULT TREE 804, CHECKED SENSOR WIRES 217B-24, 217R-24 AT TERMINAL BLOCK 324. CHECKED WINDOW HEAT AT MAIN & SPARE PINS. CHECKED OK, REPOSITIONED TO MAIN POSITION IAW SPWM 28-86-00 SYS CHECKS OK IAW AMM 30-41-00, THIS CLEARS MDDR 41957.