Aircraft Fuel Systems (1) On a large aircraft pressure refueling system, a pressure refueling receptacle and control panel will permit one person to fuel or defuel any or all fuel tanks of an aircraft. (2) Because of the fuel tank area, there are more advantages to a pressure fueling system in light aircraft. Regarding the above statements, a. only No. 1 is true. b. only No. 2 is true. c. both No. 1 and No. 2 are true.