What was found
THE PILOT REPORTED THAT SHORTLY AFTER TAKEOFF HE SETTLED INTO CRUISE WHEN FLIGHT PARAMEDIC IN CABIN NOTICED AN UNUSUALLY STRONG ODOR, THOUGHT TO BE FUEL. THE PILOT IMMEDIATELY ABORTED FLIGHT, APPLIED THE INFLIGHT PROCEDURE FOR UNUSUAL SMELLS & LANDED BACK AT BASE. TROUBLE SHOT THE ODOR, THE CABIN FLOOR WAS REMOVED TO REVEAL A LOOSE FITTING ON THE FUEL TRANSFER LINE. THIS FITTING WAS TIGHTENED & THE ODOR DISSIPATED. THE ACFT WAS THEN RETURNED TO SERVICE WITH NO MORE UNUSUAL ODORS PRESENT.