As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AFTER TURNING ON THE BLEED AIR HEATER AND DEMISTER A BURNING ODOR AND LIGHT SMOKE WAS VISIBLE IN THE COCKPIT. SMOKE AND FUMES WENT AWAY AFTER TURNING OFF HEATER AND DEMISTER AND VENTED THE CABIN. MAINTENANCE FOUND EXCESS ENGINE INLET BARRIER FILTER OIL HAD BEEN PULLED INTO P2 AIR PATH AFTER A RECENT FILTER SERVICING. EXCESS OIL WAS REMOVED AND SYSTEM FUNCTION CHECKED NORMALLY.