A software glitch affecting certain Boeing 737 MAX aircraft can reportedly disable automated flight-guidance functions during a go-around, forcing pilots to fly manually at low altitude and potentially in poor weather. The issue matters because it could increase workload during an already demanding phase of flight, although Boeing says it does not currently consider the problem a safety risk.

Boeing notified operators in late August and is developing a permanent software fix, while the FAA is investigating and may take action if it identifies a safety concern. United Airlines and Southwest Airlines have asked for affected aircraft to be delivered with earlier software, while Alaska, American, Southwest and United said their operating aircraft are unaffected; about 2,422 737 MAX 8 and 9 jets are reportedly in service worldwide.