Boeing isn’t the best example of a capitalist enterprise. It’s too big to fail. The US government is too dependent on it and the country depends on Boeing strategically.
What would the FTC do? Boeing builds aircraft for the US military. Breaking up the company or allowing it to fail jeopardizes the US’s strategic interests.
Nationalization is an option but the political climate in the US is extremely hostile to that option. Instead what I expect will happen is a massive bailout and a forced reorganization of management to fix all the issues. The government will dictate the changes the company needs to make but otherwise will remain hands off. This is how the US has done these things in the past.
Boeing developed the aircraft with taxpayer money, they build the aircraft with taxpayer money, and then they get a ton of money as profits from our taxpayer money, and lastly we bail them out with our taxpayer money.