What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED. FLIGHT CREW REPORTED FUME EVENT DESCENDING THROUGH 12K FEET. CREW ACCOMPLISHED QRH. PROCEDURES BUT SMELL PERRSISTED THROUGH ENTIRE AIRCRAFT UNTIL AFTER LANDING WHEN PACKS WERE OFF. THE AIRCRAFT LANDED SAFELY AT THE SCHEDULED DESTINATION OF DFW WITHOUT FURTHER INCIDENT. MAINTENANCE ACCOMPLISHED THE SMOKE ODOR FUME TROUBLESHOOTING TASK CARD AND FOUND SOURCE FOR THE ODOR AND NO DEFECTIVE COMPONENTS WERE IDENTIFIED.