From CNBC:

Boeing (BA) is in talks to buy back Spirit AeroSystems (SPR), the top supplier for their 737 Max jets, to address production flaws. Spirit’s stock rose 15%, while Boeing’s fell 2%. Nearly 70% of Spirit’s revenue comes from Boeing, and a quarter from Airbus. After a recent accident, Boeing faces increased FAA scrutiny for its production lines.

Read more at CNBC: Boeing in talks to buy back fuselage maker Spirit Aerosystems