As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 9804 AFTER TAKEOFF THE CREW REPORTED, SMOKE AND OIL ODOR IN COCKPIT. THEREAFTER THE SMOKE WARNING ILLUMINATED. THE CAPTAIN DECLARED AN EMERGENCY AND RETURNED TO DFW. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 2 ENGINE IAW MTX W/C 71-000-00. THE AIRCRAFT PASSED THE FUNCTIONAL CHECK FLIGHT. THE AIRCRAFT WAS RETURNED TO SERVICE.