What was found
SHORTLY AFTER TAKEOFF SMOKE WAS OBSERVED IN THE COCKPIT AND EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED FOR LANDING. AT THIS TIME THE AIRSPEED WAS READING EXTREMELY LOW. INVESTIGATION REVEALED THE STROBE/AVIONICS COOLING FAN CIRCUIT BREAKER OPEN. THE FAN ASSY EXHIBITED A STRONG BURNED ODOR AND THE PITOT LINE FOR THE LAKE AND AIR GEAR ADVISORY WAS FOUND MELTED WHERE ROUTED IN CLOSE PROXIMITY TO THE FAN MOTOR. THE PITOT LINE WAS REPAIRED AND RE-ROUTED AND A NEW BLOWER ASSY INSTALLED.