Abstract: In certain example embodiments there is provided a method and/or system for operating an aircraft, including (a) before an aircraft is loaded with passengers and luggage, performing a first measuring to measure a load on front landing gear strut(s) and rear landing gear strut(s) in order to obtain first weight data; and (b) after the aircraft has been loaded with passengers and luggage, performing a second measuring to measure a load on front landing gear strut(s) and rear landing gear strut(s) in order to obtain second weight data. Then, the first weight data is subtracted from the second weight data, while optionally compensating for fuel added to the aircraft between the times of the first and second measuring steps, in order to determine a total weight of the passengers and luggage on the aircraft. This total weight can be used in determining whether or not the plane is overloaded.