Airbus will buy some Spirit AeroSystems facilities that make parts for its jets, moving to take direct control of production in a bid to stabilize supply chains after months of disruption.

Europe’s Airbus has finalized an agreement to take some assets from Spirit AeroSystems, both companies said Monday, completing a critical part of a transatlantic carve-up of the struggling supplier with US rival Boeing.

Airbus finalised an agreement on Monday to take over some plants from Spirit AeroSystems in a carve-up of the struggling supplier with rival Boeing , as unions voiced fears over thousands of jobs in Northern Ireland and Scotland.