As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A KEROSENE ODOR WAS SMELLED IN THE COCKPIT AND CABIN AFTER TAKEOFF FROM DFW. THE AIRCRAFT WAS RETURNED TO DFW WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND FUEL LINE TO APU FCU LEAKING. THE FUEL LINE WAS REMOVED AND REPLACED. THE APU WAS RUN WITH NO LEAKS OR ODOR OBSERVED.