METHOD FOR MONITORING THE CONDITION OF A THERMAL BARRIER BY ENDOSCOPY

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The invention relates to a method of monitoring the condition of a thermal barrier by endoscopy comprising the following steps : has) introduction of an endoscopic probe within an engine, the engine comprising a coated part by a thermal barrier whose outermost layer comprises a rare earth oxide capable of producing a color other than black and white when irradiated with light of predetermined wavelength, and b) irradiating the outer layer of the thermal barrier by light radiation for the rare earth oxide to produce a color other than black and white and observation of the outer layer of the thermal barrier colored by the rare earth oxide using the endoscopic probe to monitor the condition of the thermal barrier.