You are preparing for a borescope inspection of a gas turbine engine. Prior to the inspection it is recommended that you do what?

Correct Answer: Option A — Water wash the compressor.

Performing a compressor water wash prior to a borescope inspection is standard practice to remove surface contaminants. Cleaning the blades ensures that the inspector has a clear view of the metal surfaces, allowing for the accurate identification of cracks, erosion, or corrosion that might otherwise be obscured by dirt.