Boeing has given the Brazilian government a plan to take at least an 80% stake in a new Embraer venture. The plan would create a joint company in Brazil, where Boeing would have control over the commercial jet business. If it goes through, the plan could mean new competition for a similar Airbus-Bombardier partnership. Though it’s still in the works, the plan could be implemented by Q2 of this year. What impact could this have on American aerospace?