Boeing works on software fix after new 737 MAX glitch can disable autopilot

Boeing has identified a new software defect in its 737 MAX fleet that can deactivate specific autopilot features after pilots abort a landing and alter the flight plan. The glitch originates from a recent cockpit software upgrade and could force pilots to fly manually at low altitude, possibly in adverse weather. Boeing told airlines the problem does not constitute a safety hazard and is providing a software update to resolve it, while the FAA is investigating and may act if a risk is found.

Southwest, United, Alaska and American Airlines have indicated none of their MAX aircraft are currently operating with the problematic code and have requested earlier software versions. The total number of jets with the new software is unclear, though there are 2,422 MAX 8 and MAX 9 aircraft worldwide. The issue revives scrutiny of the MAX program, which has faced past safety crises and regulatory restrictions.