Since the 1990s, additive manufacturing has been a part of naval aviation, but it's only recently that the technology has moved past strictly prototyping purposes. The US Naval Air Systems Command (NAVAIR) has been working towards making additive manufacturing a big part of their operations, starting with the creation of a 3D printed flight-critical component. On July 29, that component was tested for the first time, as an MV-22B Osprey military aircraft was successfully test flown at the Patuxent River Naval Air Station in Maryland, with its engine nacelle secured to the primary wing structure by a 3D printed titanium link and fitting assembly. Read more at 3DPrint.com: https://3dprint.com/144567/navair-3d-printed-component/