Safran Helicopter Engines (Turbomeca) explains the proper air path cleaning and rinsing techniques on their Arriel and Arrius engines using the guidance contained in the maintenance manuals. Commonly referred to as a compressor wash, this procedure maximizes power margins and prevents costly damage.

Topics covered in this video:
o Introduction
o What is the air path?
o Why does the air path require cleaning?
o Operation with Inlet Barrier Filters
o Prevention
o Maintenance manual guidance
o Operation in various environments
o Recommendations for treatment (cleaning and rinsing)
o Cleaning frequency
o Approved products
o Water quality
o Chemical cleaning procedure
o Configuring the engine for cleaning
o Preparing the chemical cleaning mixture
o Injection equipment and flow rate
o Verifying the injection rate and volume
o Ventilation/cranking limitations
o Cleaning chemical injection
o Rinsing on a running engine
o Rinsing during cranking/ventilation
o Engine reconfiguration and drying ground run
o Key point review