What was found
DFW - FLT 515 - EN ROUTE DFW-COS, SHORTLY AFTER TAKEOFF, HEAVY SMOKE WAS REPORTED IN CABIN. EMERGENCY DECLARED, RETURNED DFW AND LANDED WITHOUT INCIDENT. ACCOMPLISHED PACK BURN OUT. NO SMOKE OR ODORS NOTED. PRECAUTIONARY REPLACED COALESCER BAGS. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)