Boeing is buying Spirit Aero — which makes the door plug that flew off the Alaska Airlines flight — in a $4.7 billion deal

• Boeing is buying back Spirit Aero, a manufacturer of parts for its 737 and 787 planes, per Reuters.
• The $4.7 billion all-stock deal was announced early Monday morning.
• The deal brings Spirit Aero back into Boeing's fold and should improve the production of its aircraft.

Boeing is buying back Spirit AeroSystems, a manufacturer of parts for its 737 and 787 planes, in a $4.7 billion all-stock deal, the companies said early Monday morning.