FIELD: measurement engineering.;SUBSTANCE: method can be used for diagnosing technical condition of gas turbine engine during production, test and exploitation. Electro-static aerial is mounted behind cut of nozzle outside engine and its reactive gas-dynamic jet for registering pulsation of electric field generated by charged particles (electrons, ions, microscopic particles) which attend in moving jet. Dispersion &sgr;j is calculated from set of N points of registered signal during period of inspection in preset time period within preset time interval. Characteristic frequencies are determined in spectrum of registered signal and calculated dispersion of &sgr;j is compared with preset and determined in advance, reference value of &sgr;*. If &sgr;j exceeds the bounds of preset range and there are frequencies in spectrum range being different reference ones, the failure is supposed to take place.;EFFECT: increased efficiency of diagnostics; reduced time for diagnostics.;3 dwg
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