What was found
AC WAS LOADED FOR A TRIP WITH ENGINES STARTED. THE FUEL QUANTITY INDICATOR FOR THE AIRCRAFT LT AND RT TANKS WAS STEADY, BUT QUANTITY WAS LOW WITH A FULL FUEL LOAD ON BOARD, VISUALLY VERIFIED BY PILOT. TAXIED BACK TO THE HANGER AND UNLOADED PASSENGERS TO DIFFERENT AC AND CONTINUED CHARTER OPERATIONS. THE FUEL GAUGE WAS FOUND TO BE FAULTY AND A NEW GAUGE WAS ORDERED AND INSTALLED. THEY FOUND THE AIRCRAFT TO BE IN LIMITS AND SIGNED OFF THE WRITE UP IN AIRCRAFT DISCREPANCY LOG ON 7/1/03. THE AC THEN RETURNED TO SERVICE.