Vibration diagnostics of gas-turbine engines rotor bearings using the cold cranking

In article the questions of vibration diagnosing of gas-turbine engines rotor bearings on the example of three shafts engine of “NK” brand are considered. The analysis of possible methods of vibration diagnosing, their advantages and shortcomings is carried out, the methods of vibration diagnosing using the cascade spectral analysis on the mode of engine cold cranking is presented.