https://www.moonofalabama.org/2019/12/boeing-will-have-to-stop-its-737-max-production-line-what-will-trump-do-to-avoid-it.html
There are thousands of companies, big and small, involved in building an airplane. If Boeing has to shut down the production line many of the hundred thousand people involved will have to move on to do something else. The people and their know-how will try to find someone else to work for. Some of the involved companies may go bankrupt. That will make the later restart of the production line difficult and costly.
But Boeing's current stock of 400 planes will already take more than a year to clear. Boeing simply can not afford to make hundreds of new planes that are not allowed to fly.
Boeing's lobbyists emphasize that Boeing is one of the largest U.S. exporters and that several hundred thousand people are involved in building its planes. If Boeing has to shut down its 737 production line many of them will lose their jobs.
That will not look good for the sitting president during a re-election year. But what could Donald Trump do to avoid it?