Boeing resumed production of the 737 MAX on May 27, 2020, after a 16-month grounding that began in March 2019 following two fatal crashes. The company had halted production in January 2020 due to the ongoing issues and regulatory scrutiny surrounding the aircraft. The resumption of production marked a significant step in Boeing's efforts to return the 737 MAX to service and restore confidence in the aircraft.

If you need more detailed information about the 737 MAX's return to service or its production timeline, feel free to ask!