As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3552 - CREW REPORTED OIL/SMOKE FUMES IN COCKPIT DURING APPROACH TO DFW. MAINTENANCE CHECKED ACM AND ENGIEN FOR OIL LEAKS, NONE WERE FOUND. FCF WAS PERFORMED AT VARIOUS ALTITUDES AND POWER SETTINGS AND THE PROBLEM COULD NOT BE DUPLICATED. AIRCRAFT WAS RETURNED TO SERVICE. (M)