What was found
FUEL ODOR COMING FROM COCKPIT VENTS WHEN TEMPERATURE IS INCREASED. FUEL ODOR COMING FROM COCKPIT VENTS IS ELIMINATED BY DECREASING TEMPERATURE. BLEED AIR SOURCE MAKES NO DIFFERENCE. FUEL ODOR IS PRESENT USING ENGINE BLEED AIR AND AND FUEL ODOR IS PRESENT USING APU BLEED AIR. GAINED ACCESS TO THE APU ENCLOSURE AND DURING AN OPS CHECK, FOUND A SMALL SEEP COMING FROM THE FUEL FLOW TRANSDUCER LINE ON OUTPUT END OF THE TRANSDUCER, TIGHTENED THE LINE, OPS CHECKED APU, LEAK CHECKED SATISFACTORY.