As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF AT 4000FT. ECAM ALERT OF MAIN DECK CARGO SMOKE. FOLLOWED QRH AND RETURNED TO DEPARTURE. WE HAD EXTENSIVE ICE ON ACFT WHICH REQUIRED 1 HR 45 MIN OF DEICING. EMERGENCY DECLARED. IAW CREW DEBRIEF, SMOKE INDICATIONS CEASED. VERY STRONG ODOR OF DEICE FLUID IN ACFT. NO HOT INDICATIONS WERE FOUND DURING FIRE DEPARTMENT INSP. OPENED MCD AND R1 DOOR RAN PACKS TO VENT ACFT. ACFT NOW CLEAR OF DEICE FLUID HAZE.