Boeing buys out partner Hexcel from their Malaysia-based ACM aircraft composite joint venture during 4Q. Hexcel says it was paid $45M for its 50% stake in the 22-year old business, which makes wing and aileron parts. Spirit AeroSystems makes the door plugs for Boeing’s 737 MAX at its Malaysia plant. Boeing says it reinstalled the plug that failed on an Alaska Airlines flight. Hexcel shares down 8% after big 4Q profit miss.