The component N 73104, commonly referred to as a “cocoon,” acts as a protective housing element within the Sulzer ASL25 engine assembly. Its primary purpose is to shield sensitive internal components from mechanical damage, contamination, and environmental influences during engine operation. Designed for structural strength and dimensional stability, this protective element helps maintain proper operating conditions around critical mechanisms. By safeguarding adjacent components and supporting the integrity of the assembly, the N 73104 cocoon contributes to enhanced durability, reliability, and overall engine safety.