As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE CREW REPORTED SMOKE IN THE COCKPIT DURING TAKEOFF. THEY ELECTED TO RETURN TO THE POINT OF DEPARTURE WHERE A SAFE LANDING WAS MADE. POST FLIGHT ENGINE RUNS REVEALED SMOKE COMING FROM THE AIR CONDITIONING DUCTS BEHIND THE CREW SEATS. TROUBLESHOOTING IS ON-GOING TO IDENTIFY THE ORIGIN OF THE SMOKE.