The flutter of turbines blades may be a reason of the blades damage. In this paper considered are the advantages and the drawbacks of the registration of the similar flutter with help of the modern variant of the discrete-phase method. Indicated is that additional errors in the flutter registration may be due to the torsion and longitudinal vibration of turbine and generator rotors assembly, as well as axial vibration of the stator details where the induction gauges are fastened, which was caused by the self-excited vibrations of the shoulder blades with in-phase natural forms. Recommended are the measures to reduce the errors in measurements.