What was found
FUEL ODOR NOTICEABLE AFTER TAKEOFF. THE AIRCRAFT RETURNED TO BASE. MAINTENANCE INSPECTED BELLY, SUMP DRAINS, AND DRAIN PORTS, FOUND NO EVIDENCE OF LEAKS. ALSO, THE MECHANIC INSPECTED BOTH ENGINES FOR EVIDENCE OF FUEL LEAKS, FOUND NONE. MAINTENANCE OPERATIONAL CHECK SHOWED NO LEAKS DURING OPERATION OR ODORS DURING FLIGHT.