What was found
THIS FLIGHT WAS EN ROUTE FROM KDFW TO KPHX. AT CRUISE OVER THE AREA OF KMAF, THE PILOT NOTICES THE RIGHT FUEL QUALITY INDICATOR SLOWLY DECREASING FUEL QUANTITY FROM 1500 LBS. A SHORT TIME LATER IT STOPPED AT 500 LBS. APPROXIMATELY 30 MINUTES LATER THE FUEL QUANTITY DECREASES ANOTHER 150 LBS. AFTER ANALYZING THE SITUATION, THE PILOT DECIDED TO RETURN TO KDFW AS A PRECAUTION OF A SUSPECTED FUEL LEAK. ATC DECLARED AN EMERGENCY AND THE LANDING WAS WITHOUT INCIDENT. MAINTENANCE INSPECTED AIRCRAFT AND FOUND NO FUEL LEAK. A FUEL QUALITY CHECK WITH THE MAGNA STICKS CONFIRMED THAT THE FUEL GAUGE INDICATOR MALFUNCTION. MAINTENANCE REMOVED AND INSTALLED A SERVICEABLE RIGHT FUEL QTY HARNESS, PART NUMBER AMF32-82030-008.THEY ALSO REMOVED AND INSTALLED A SERVICEABLE RIGHT #2 FUEL PROBE, PART NUMBER PAA575-4. THE CALIBRATION OF THE FUEL INDICATOR WAS COMPLIED WITH. ALL CHECKS FOUND SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE AND NO ISSUES HAVE BEEN REPORTED ON ANY SUBSEQUENT FLIGHT.