As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT , 3000 FT, F/A CALLED COCKPIT AND REPORTED A CLOUD OF SMOKE IN THE CABIN AND A BURNING SMELL. CAPTAIN DECLARED EMERGENCY AND LANDED WITHOUT INCIDENT. MX PERFORMED ENGINE RUNS AND FOUND NO EVIDENCE OF SMOKE OR SMELL IN CABIN. INSPECTED PACK 2 AND FOUND EVIDENCE OF COFFEE GROUNDS IN THE HEAT EXCHANGER AND DEFERRED PACK 2. THE DEFERRAL WAS CLEARED 5/17/10 BY REPLACING THE ACM.