This paper focuses on the validity of the used assumptions in the development of the Decoupled approaches which predict the aeroelasticity behavior of turbomachinery blades. A Decoupled approach is employed to evaluate the aerodynamic damping and the forced response of a low pressure compressor BluMTM induced by low engine excitations. The validity of the assumptions like superposition principle, linearity of aerodynamic damping and the blade-motion independency of the aerodynamic forces are verified by employing the TWIN approach. Extensive experiments are also carried out to evaluate the overall performance of the approaches.