When the solution wash is performed, it is known as a

• A. Desalination wash
• B. Water wash
• C. Maintenance wash
• D. Performance recovery

Answer: (D)

Cleaning with a chemical solution is used to dissolve deposits like gum, varnish, and scale that build up in the compressor and upstream areas, which slows airflow and reduces efficiency. By removing these deposits, the engine’s airflow, compressor performance, and overall efficiency are restored, bringing the engine back toward its original performance. This restoration of lost performance is why the process is described as performance recovery. Other wash names describe different methods or scopes—desalination wash isn’t a standard term for engine cleaning, a water wash uses only water rather than a chemical solution, and a maintenance wash is a broader, less specific cleaning. The purpose of a solution wash is specifically to recover performance by removing deposits.