Question 57Gas Turbine - 1st Asst/Chief

The correct answer is C) Water wash the compressor. Before performing a borescope inspection of a gas turbine engine, it is recommended to water wash the compressor section of the engine. This helps remove any accumulated contaminants or deposits that could interfere with the inspection and provide a clearer view of the internal components. Washing the compressor, but not the power turbine, is the appropriate step as the power turbine section is typically not a focus area for the borescope inspection. The other options are incorrect because: A) Washing both the compressor and power turbine is unnecessary for the borescope inspection; B) Washing only the power turbine would not address potential contaminants in the compressor section; and D) Not washing the engine prior to the inspection could result in an obscured view during the borescope inspection.