The conventional way to perform the longitudinal static stability flight test for civil transport aircraft is stabilized method. While the main disadvantage of the stabilized method is insufficiency of flight test data due to the fast and large altitude changing. This article focuses on the advantage and disadvantage about the applicability of the longitudinal flight test methods proposed by AC25-7C, which are stabilized method and acceleration-deceleration method. The initial conclusion is that the acceleration-deceleration method can apply to the level flight trim test points, and the method is still to be confirmed by simulator test and flight test during the applicability of the maximum thrust and idle thrust test points.