This standard defines the rules to be observed to ensure the quality of aerospace structures in metallic materials by (solid code 521 and gas code 522 and diode laser Semi-conductor 523 according to EN ISO 4063:2009) laser beam welding, implemented automatically, semi-automatically or manually.It is applicable without any restriction for the manufacturing of new parts or repair parts, these operations being under the responsibility of an approved Design Authority or repairer.