As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE IN AFT CABIN DURING FLT - ISOLATED NR 3 PACK AND APPEARED TO CLEAR - PACK TEMPS NORMAL. CORR. ACTN. CHKD ALL 3 A/C PACKS AND OK. RAN SYSTEMS ON GROUND WITH NO ODORS OR VISIBLE POLLUTANTS IN CABIN. RENDERED NR 3 PACK INOP PER MEL 21-51-07A AND PLACED ON MCO AND PLACARD.