The resilient mounting arrangement, code HD1903, is an important vibration-isolation system associated with the installation of the MAN L21/31 engine, designed to provide stable mechanical support while reducing the transmission of engine-generated vibration and dynamic forces to the surrounding foundation or supporting structure. Depending on the installation design, the arrangement may incorporate elastomeric elements, steel springs, or other engineered resilient supports that allow limited controlled movement while maintaining the required engine position and load distribution. Effective resilient mounting helps minimize structure-borne noise, reduce vibration-related stresses in adjacent equipment and piping, and improve operating conditions for the engine and surrounding machinery. Correct selection of mounting stiffness, load capacity, natural frequency, damping characteristics, and installation geometry is essential to avoid excessive movement, resonance, or uneven load distribution. During maintenance, the mounting elements should be inspected for deformation, cracking, material deterioration, corrosion, loss of elasticity, incorrect alignment, and damage to associated fastening components. By combining reliable engine support with effective vibration isolation, the resilient mounting arrangement contributes to reduced mechanical fatigue, improved operational stability, protection of connected equipment, and the long-term reliability of the MAN L21/31 engine installation.