As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT 3460, OUT OF GFK, SMOKE IN FLIGHT DECK. AIR RETURN TO GFK. RIGHT PITOT HEATER FAIL LIGHT CAME ON AFTER TAKEOFF. SMOKE ON F/O SIDE CAME OUT OF FLOOR VENT FOR 30 SECONDS THEN DISSIPATED. MAINTENANCE REPLACED RT MAIN PITOT TUBE P/N 9453, S/N OFF 8652. PITOT TUBE LEAK CHECK AND HEAT CHECKS GOOD IAW ARJ85MM CHAP 34.