Boeing Flags 737 MAX Guidance Glitch to Airlines

Boeing has told airlines about a software problem that can interrupt automated flight guidance on certain 737 MAX 8 and MAX 9 aircraft. The trouble can appear when a landing is abandoned and the crew begins a go-around. The system may drop the approach path, leaving pilots to restore automation or continue manually.

Boeing found the defect in November 2024 but did not alert operators until last month because it was not considered a safety threat. The company says current cockpit procedures cover the situation, and pilots are trained to fly and land without vertical navigation. Boeing is also developing a software correction and working with affected operators on steps to restart the automated system.

The FAA is examining the matter through a Corrective Action Review Board. It will consider whether changes are needed for future aircraft, including the MAX 7 and the certification-stage MAX 10. Southwest and United say their existing MAX fleets do not use the affected software, although both are coordinating with Boeing. The number of aircraft involved has not been established.