Large Repairs – On Field Large Repairs of Composite Aircrafts
Since 2001, through a “LabCom” methodology of collaboration, CES company and ICA lab have studied parameters which pilot the full repair process from the damage detection and mapping up to the final approval by airworthiness authority . These studies have included design optimization thanks to MITE toolbox, cost and downtime optimizations thanks to optimized milling strategies and rapid manufacturing of specific low cost high precision tools or mechanical optimization of the assembly between the patch and the safe structure through numerical tools developed by the team. By means of a comparison between a common process and the process developed by the team, our presentation will underline the potential impacts of theses optimizations and the technical and scientific challenges that are faced by us.This paper is focused on large damages on composite primary structures (e.g. wing or fuselage  ) which mean that loss of repair patch is synonym of aircraft loss and critical injuries or death for people. It seeks to provide a synthesis of scientific, industrial and economical bottle necks and challenges linked to common and innovative large repairs process.
Authors: Yves-Henri Grunevald, Francis Collombet, Laurent Crouzeix
Conference: SAMPE Europe Conference 2016