Gomez Vinas, Esteban, Chorro Matinez. J.Manuel, Martinez Perez Angel, Perez Hernandez, J.M, Perez San Jose, Jorge
DOI Number: N/A
Conference number: IFASD-2015-069
Civil Certification Regulations request aircraft design to be such that the possibility to have a catastrophic event after an engine uncontained rotor failure event is limited to 1/20th for the whole aircraft taken into account all debris potential trajectories. A400M military transport Aircraft is designed with a particular configuration where MLG is located at same longitudinal position than the engines and therefore in the shot line of engine debris potential trajectories. This fact is particularly special, since this is the first time that LG structure includes UERF event in its certification basis. This MLG fixed part is an isostatic structure and great effort was devoted to demonstrate the capability of this damaged structure, that in a first approach is a mechanism, to sustain the loads produced during emergency maneuvers like landing and braking the plane. This paper highlights the way forward carried out by Airbus DS with a new methodology using a complex dynamic analysis to find out the collapse movie after the impact, whose final result have achieved the approval by the certification authorities.