Boeing Flags 737 MAX Software Glitch Affecting Automated Flight Guidance

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.
The FAA said it would convene a Corrective Action Review Board to assess the issue, in addition to reviewing Boeing’s proposed fix.
Boeing reportedly told airlines in late August that it did not consider the glitch a safety risk.
Boeing does not know exactly how many MAX aircraft have the affected software because airlines are not required to notify the company when they install an upgrade; Cirium estimates 2,422 MAX 8 and MAX 9 jets are flying worldwide.
The FAA certified the MAX 7 with the newest software in early August, but it remains unclear whether that model could be delivered or operated with an older software version.
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