The component N 73104, often referred to as a protective “cocoon,” serves as a structural shielding element within the Sulzer ASL25 engine assembly. Its function is to protect sensitive mechanical components from contamination, mechanical damage, and external environmental influences during operation. Manufactured with robust material and precise geometry, this protective enclosure helps maintain stable working conditions for adjacent components while minimizing exposure to vibration and debris. By safeguarding critical internal elements, the N 73104 cocoon contributes to improved reliability, reduced wear, and the long-term durability of the engine’s mechanical systems.