This report will provide a detailed technical account of the lessons learned since the two fatal accidents involving the Boeing 737 MAX aircraft, as well as the actions by the U.S. Federal Aviation Administration (FAA) to ensure the airplane’s safe return to service. As the State of Design agent, the FAA is providing this report to all States of Registry and to the general public to assist in their understanding of how the agency identified and is addressing the safety issues affecting the 737 MAX.