The senior U.S. aircraft manufacturer, Boeing, has agreed to buy Spirit AeroSystems for a stunning $4.7 billion. Spirit AeroSystems makes components for planes and used to be part of operations here at Boeing. They split up some two decades ago but now, after months of discussion and negotiation, they have decided to come back together again.

Before reaching an agreement with Boeing, Spirit had already agreed to a deal with Airbus—Boeing’s European archival. Under this separate agreement, Airbus would support some of Spirit’s production obligations for making elements for its own plane packages. In this respect, Airbus will now take over the work that Spirit used to do for Airbus A220 and A350 airplanes at numerous places around the world, including Belfast in Northern Ireland.

Spirit AeroSystems is best known for constructing the fuselage—a Boeing 737 Max jet’s main frame. Recently, though, they have been in compromising situations about the best of their production processes, which delay the production of airplanes. Last year, Spirit appointed a new CEO, Patrick Shanahan, formerly of Boeing, to address those issues and ramp up operations.

Boeing has been discussing with Spirit AeroSystems since March to finalize this purchase agreement in a belief that Spirit coming back under their wing will enhance safety and quality in airplane manufacturing. This becomes extremely important after a really terrible incident early this year where a section of the main frame of a Boeing 737 MAX aircraft experienced a mid-air problem.

In a statement it issued in March, Boeing indicated that the integration of Spirit Aerosystems into their production processes could now not only strengthen aviation safety but also be in the best interest of their customers, employees, and shareholders.

All this significant acquisition has been made possible by Boeing through the help of financial advisors PJT Partners, Goldman Sachs, and Consello, with criminal counsel supplied by Sullivan and Cromwell. On the other hand, monetary advice centres on Spirit AeroSystems through Morgan Stanley and Moelis, together with criminal assistance from Skadden.

The entire acquisition deal was first reported by Reuters, but it’s a huge uplift in the aerospace industry and the ongoing opposition between Boeing and Airbus.

Boeing’s acquisition of Spirit AeroSystems for $four.7 billion is a strategic move toward strengthening its manufacturing capabilities, enhancing protection requirements in its airplanes. An acquisition would thus not only reunite two companies whose activities had earlier been very closely interlinked together but also emphasize Boeing’s renewed commitment to improving performance and assurance in class-leading aircraft manufacturing.