European plane-maker Airbus will take over parts of Spirit AeroSystems, a key supplier for Airbus and Boeing, as the two manufacturers carve up Spirit.

Airbus and Spirit moved one step closer to finalizing that breakup. On Monday, the companies announced an agreement for Airbus to acquire some Spirit facilities in the U.S., Europe and Africa, where the supplier produces crucial components for Airbus planes.

Boeing is set to acquire other parts of Spirit, including its Wichita, Kansas, headquarters where Spirit makes the forward fuselage for every Boeing commercial plane and the entire fuselage for the 737 MAX. That $4.7 billion deal has been in the works since last year, and is expected to close later this year.

Boeing, Spirit and Airbus announced the plan to split the supplier and take production back in-house last July, hoping to improve quality and safety of the airplane components both major manufacturers rely on.

Spirit, which spun out of Boeing two decades ago, has been plagued by manufacturing defects and reports of unsafe processes in its factories for years . The supplier was swept up in regulatory scrutiny following a panel blowout in January 2024, when a piece of the fuselage blew off a 737 MAX 9 plane midflight. That fuselage had been produced in Spirit’s Wichita factory before it was shipped by train to Boeing’s Renton factory.

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Former Boeing CEO Dave Calhoun said in July, at the time of the acquisition announcement, that the deal “is in the best interest of the flying public, our airline customers, the employees of Spirit and Boeing, our shareholders and the country more broadly.”

“By reintegrating Spirit, we can fully align our commercial production systems … and our workforce to the same priorities, incentives and outcomes — centered on safety and quality.”

Boeing is set to acquire practically all Spirit operations related to Boeing’s commercial planes, as well as some defense and aftermarket assets.

Boeing will also take on Spirit’s last reported net debt of $3.6 billion, so the total transaction value is about $8.3 billion.

Airbus will also acquire production of A220 pylons in Spirit’s Wichita factory.

It could also acquire the rest of Spirit’s Belfast site, where it produces the A220 mid-fuselage, and Spirit assets in Subang, Malaysia, if another buyer is not identified before the deal closes.

Because the deal was engineered largely to fit Boeing’s needs, Airbus won’t pay anything to acquire its parts of Spirit.

Under Monday’s agreement, Airbus will receive $439 million from Spirit, adjusted from the original $559 million it was set to receive as the two companies finalized the parameters of the deal.

Irene Esteves, Spirit’s executive vice president and chief financial officer, said in a statement Monday, “entering into this agreement is a significant milestone as we work towards the closing of the Boeing acquisition, to the benefit of Spirit, its stockholders and other stakeholders.”