According to my work, I get a sample of rotor blades and then testing many NDT methods to find the most precised testing method. Also come up with the newly developed technique Shearography. Comparing the later one to Infra-red Thermography. The work was little bit complicated due to lack of equipments but i would be able to complete it just because of my mentor's guidance and help from the friends. The conclusion and results are shown in this book and can be used as a reference for future researchers.