What was found
EN ROUTE BETWEEN MKE AND DEN, THE AIR CONDITIONING PACKS WERE PRODUCING A STRONG, UNIDENTIFIED ODOR. ON THE GROUND IN DEN, THE PACKS WERE OPERATIONALLY CHECKED AND FOUND NOT TO BE PRODUCING AND ODOR AT THAT TIME. A REVIEW OF THE FLIGHT SUGGESTED THAT A SMALL AMOUNT OF DE-ICE FLUID MAY HAVE BEEN PULLED INTO THE BLEED AIR SYSTEM, PRODUCING A RESIDUAL ODOR. (M)