Dielectric protection of a transformer bushing crumbles as an element of temperature, oxidation, and dampness. This causes quickened maturing of oil and cellulosic strong protection, producing flaw gasses inside bushing oil and thus permanent failure. To counteract such disappointments, viable examinations and findings should be researched. Dissolved gas analysis (DGA) can give the sign of inner variations from the norm inside the transformer bushing. Also, frequency response analysis (FRA) is a generally acknowledged apparatus for mechanical disfigurement analysis inside power transformers. In spite of the fact that a substantial number of studies have been led on the identification of transformer twisting distortion by FRA method, the effect of bushing deficiencies on the transformer FRA signature has not been adequately examined. The objective of this paper is to propose exact intelligent method and additionally handy investigations showing the effect of bushing issues on the FRA signature.