As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANT REPORTED THAT SMOKE WAS IN THE PASSENGER CABIN, AS THE AIRCRAFT WAS PASSING THROUGH 6000 FT. DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE, LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED FIM 21-20-00 AND FOUND THE RIGHT AIR CONDITIONING PACK TO BE FAULTY. REMOVED AND REPLACES THE RIGHT AIR CYCLE MACHINE. AIRCRAFT RETURNED TO SERVICE.