What was found
DURING PDC FOUND WING ANTI-ICE LT VALVE, RT VALVE AND ENGINE ANTI-ICE COWL ANTI-ICE AND COWL VALVE OPEN LIGHTS WILL NOT TEST. ACFT GROUNDED. FOUND ENGINE 1 ANTI-ICE ENGINE AND WING CONTROLLER C/B POPPED. RESET C/B. MOVED WING ANTI-ICE SWITCH TO ON. C/B POPPED. T/S DISCONNECTED NR 1 COWL ANTI-ICE VALVE NO HELP. DISCONNECTED NR 1 GROUND. THERMAL ANTI-ICE SOLENOID VALVE NO HELP. DISCONNECTED NR 2 GROUND THERMAL ANTI-ICE SOLENOID VALVE NO HELP. SWAPPED CAT PANEL , NO HELP. RETURNED CONTROLL PANEL AND OPS CHECKED. REF AMM 30-11-00. REPLACED C/B ANTI-ICE ENGINE & WING CONTROLLER REF AMM 20-00-00, NO HELP. DISCONNECTED CONNECTOR PLUG D30404 AT NR 2 ENGINE PYLON. FIREWALL LIGHTS REMAIN ILLUMINATED & C/B DOES NOT TRIP. RECONNECTED NR 1 COWL ANTI-ICE VALVE REF AMM 30-21-11. RECONNECTED NR 1 GROUND THERMAL ANTI-ICE SOLENOID VALVE REF AMM 30-11-12. REPLACED NR 2 ENGINE NACELLE WIRING HARNESS REF AMM 71-51-03.