What was found
DURING DECENT, RECEIVED A PITOT 3 INOP MESSAGE. WENT AWAY AFTER A FEW SECONDS. 24 MINS OUT, A HINT OF SMOKE NOTED. AN EMERGENCY DECLARED. AN LG AIR/GND FAIL MESSAGE. SMOKE VISIBLE, DONNED 02 MASKS & SMOKE GOGGLES. SMOKE COMING FROM FO VENT, HEAVY SMOKE SEEN COMING FROM AFT PORTION OF VENT. 4 MILES & 8,000 FT FROM MDW A NO TAKEOFF CONFIG MESSAGE APPEARED. FLT TOUCHED DOWN & CREW COULDN`T GET RT T/R OPEN. MX INSPECTED ACRFT & FOUND BURNED WIRES, RELAYS, & INSULATION. REPAIRED WIRES FOR RT HAND RELAY SUPPORT PANEL IAW EMB 145 WM. R & R DAMAGED RELAYS & RELAY PANEL IN RT RELAY SUPPORT PANEL IAW EMB AMM & EMB WM. MX FOUND PITOT 3 PROBE PITTED & BURNED. R & R PITOT 3 PROBE IAW EMB 145 AMM. TEST FLT GOOD.