To obtain useful weight data for purposes of determining CG, it is necessary that an aircraft be weighed in a level flight situation with all items of useful load installed and with no more than minimum fuel (1 1/2 gallon per METO horsepower) in all fuel tanks. What conditions must be met to obtain useful weight data for determining CG?
1) Weigh the aircraft in a level flight situation
2) Install all items of useful load
3) Have no more than minimum fuel in all fuel tanks
4) All of the above