What was found
DFW - FLT 857 - EN ROUTE PBI/DFW, DURING CRUISE, SLIGHT SMOKE ODOR NOTED IN CABIN ON TWO OCCASIONS. NO OTHER ABNORMAL INDICATIONS AND AIRCRAFT PROCEEDED TO DFW, LANDING WITHOUT INCIDENT. ACCOMPLISHED PACK BURNOUT PROCEDURE AND REPLACED BOTH COALESCER BAGS. ACCOMPLISHED GROUND ENGINE RUN AND OPERATED BOTH PACKS USING ENGINES AND APU WITH NO ODOR NOTED. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)