A GAS TURBINE ENGINE HAVING A METALLIC TEST SAMPLE AND A METHOD OF DETERMINING THE SERVICE LIFE OF A GAS TURBINE ENGINE COMPONENT USING A METALLIC TEST SAMPLE

摘要

A method of determining the service life of a gas turbine engine component (40, 50, 54) comprises providing, within a gas turbine engine (10), a component (40, 50, 54) having an air washed surface, the component (40, 50, 54) comprises a metal, wherein the air washed surface receives a supply of cooling air from a chamber (68) within the gas turbine engine (10). The method also comprises mounting a metallic test sample (76) within the chamber (68) so as to be located in the supply of air which is delivered to the air washed surface. The metallic test sample (76) is constructed of the same metal as the component (40, 50, 54). The method further comprises removing the metallic test sample (76) and determining the degree of corrosion of the metallic test sample (76).