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The method for technical state evaluation of oil-lubricated units of aircraft gas turbine engines using measurement of wear particle parameters and the microwave plasma method is suggested. Diagnostic features accounting for quantity and composition of wear particles in oil samples and oil filter wash samples have been discovered. Parameter levels for non-defective engines are evaluated. Reference statistical models for non-defective engines, which take into account engine type and engine operating time, are calculated. Distribution laws of parameter values are evaluated, and value normalization functions were found. Actual validity with accuracy up to a unit has been estimated to be 85%, which is confirmed by factory disassembly study of engines, removed from operation by the results of evaluation.

Technical state evaluation of oil-lubricated parts and units of aircraft gas turbine engines using microwave plasma method