The A350XWB aircraft is the last project developed and produced by the European Company Airbus. The A350XWB is a wide-body twin-engine aircraft with double aisle and builded with advance materials (more than 50% of the structure is made of composite materials). ICEMM has worked intensively since 2012 on different parts of the aircraft in the structural area: fuselage (S19 and S191), Belly Fairing, wing, HTP and Landing Gear The technological activities performed by ICEMM have been the folloging: static analysis (metallic and composite), non-linear analysis, fatigue and damage tolerance , acoustic fatigue, finite element models (GFEM and DFEM), develop of structural methodologies and stress tools.