The Federal Aviation Administration (FAA) has proposed a plan to allow the Boeing 737 MAX to return to service in the United States. The plan includes several new requirements, such as the installation of new software, additional pilot training, and inspections.

But whether the FAA's plan will be adopted outside of the U.S. remains uncertain. Some countries have already expressed concerns about the safety of the 737 MAX, and they may be hesitant to allow it to fly again until they have conducted their own reviews.

The European Union, for example, has said its own aviation regulators will have to approve the plane before flights resume in European airspace. Canada and China have also indicated they may conduct their reviews.

The FAA's plan is not the final word on the matter, and it is likely that other countries will have a say in whether or not the 737 MAX is allowed to fly in their airspace.

In summary, the FAA's plan for the 737 MAX to return to service may not necessarily guarantee its return outside the United States, as other countries may conduct their own assessments and regulations before allowing the aircraft to fly in their airspace.