As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE CREW NOTICED A SUBTLE ODOR OF FUEL/OIL PERMEATING THE COCKPIT AND CABIN. THE AIRCRAFT LANDED SAFELY. UPON INSPECTION FUEL WAS FOUND LEAKING FROM THE AUSILIARY POWER UNIT(APU). MAINTENANCE REMOVED AND REPLACED THE APU FUEL FILTER HOUSTIN O-RING. OPS AND LEAK CHECKS GOOD. AIRCRAFT OK FOR SERVICE.