As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: OIL SMELL ON DESCENT INTO DFW. STARTED AT FL250 THROUGH LANDING. MAINTENANCE FOUND THE APU TURBINE BEARING RETURN TUBE LEAKING AND REPLACED IT PER CMM 49-26-95. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODORS NOTED.