As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1048 TPA-CLT - SMOKE IN CABIN - AIRCRAFT CABIN FILLED WITH DENSE SMOKE ON TAKEOFF. SMELL DESCRIBED AS MATCHES, SULPHUR OR BURNING RUBBER. NO SMELL IN COCKPIT. CREW DECLARED AN EMERGENCY AND RETURNED TO TPA. MAINTENANCE FOUND AIR CYCLE MACHINE SEIZED - REMOVED AND REPLACED ACM PER AIRBUS MAINTENANCE MANUAL 21-51-21. ALSO REPLACED FLOW CONTROL VALVE PER AMM 21-51-51 AND BYPASS VALVE PER AMM 21-51-53.