Boeing flags 737 MAX landing navigation glitch

Boeing disclosed a software glitch affecting certain 737 MAX aircraft that can disable automated flight guidance after a missed approach if pilots change the planned flight path, potentially requiring them to fly manually during a demanding phase of landing. Boeing says it informed operators of existing procedures and is developing a permanent software fix. The FAA is reviewing the issue and says it will take action if it identifies a safety concern. Southwest and United have sought new aircraft with an earlier software version, and several U.S. airlines say their current MAX fleets do not have the affected update; the number of aircraft worldwide that may have it remains unclear.