What was found
PROPELLER DE-ICE WAS SELECTED ON AIRCRAFT CLIMBING THROUGH SNOW FLURRIES. THE PROPELLER DE-ICE PIGTAIL WIRES AT PROPELLER HUB WERE SHORTED TO THE SPINNER. THIS CAUSED SMOKE IN THE COCKPIT. AIRCRAFT RETURNED AND MADE AN UNEVENTFUL LANDING. THE PROPELLER DE-ICE CIRCUIT BREAKER DID NOT TRIP TO THE OFF OR OPEN POSITION ALLOWING THE WIRING FROM THE CIRCUIT BREAKER TO THE DE-ICE GAUGE TO BURN IN TWO.