What was found
(CAN)#1 ENGINE FLAME OUT. FUEL GAUGE SHOWED 280 LBS, #1 FUEL LOW LIGHT ON #2 LIGHT OFF. FUEL QUANTITY SELECTOR SHOWED L/H TANK AT 0 LBS & R/H TANK 280 LBS. SELECTED INTERCONNECT OPEN UNTIL FUEL EQUALED IN BOTH TANKS. FUEL SAMPLES TAKEN THEN FUEL FILTERS DRAINED #2 DRAINED NORMALLY BUT #1 HAD SOUNDS OF AIR PASSING THROUGH. AIRCRAFT GROUND RUN, NO FURTHER INCIDENT. CONCLUDED THAT FLAMEOUT OCCURRED DUE TO FUEL STARVATION DUE TO AIR IN SYSTEM.