As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF SMOKE ENTERED FLIGHT DECK AND CABIN AT APPROX 1000FT MSL. RETURNED TO FIELD. CABIN AND FLT DECK BEGAN TO CLEAR ON FINAL. FOUND DE-ICING FLUID CONTAMINATION IN AC SYSTEM AFTER DE-ICING. SMOKE BURN OUT OF PNEUMATIC SYSTEM AND REPLACEMENT OF COALESCER BAGS. RAN ENGINES AT VARIOUS POWER SETTING, NO SMOKE.