Boeing 737 MAX Software Flaw Can Disconnect Automated Vertical Guidance After Go-Arounds; FAA Reviewing

BA said it flagged a software issue last month on some 737 MAX jets that can affect automated approach functions after a missed approach, and the FAA said it is assessing the problem, will review Boeing's proposed fix, and "will take immediate action if it identifies a safety concern" . The issue arises when pilots go around from a precision approach with the autopilot engaged and then modify the route in the flight management computer: vertical navigation (VNAV) can disconnect, leaving a less sophisticated form of automated pitch control. Boeing said pilots are trained to land without the automated system .

The flaw is not new. It affects versions 14 and 14.1 of the MAX flight management computer software, was first reported in November 2024, and Boeing initially found no safety concern in February 2025. Boeing said it has shared procedures with operators and is working on a software update, though reporting from Airways Magazine indicates a permanent fix may not be ready until 2028, with updated pilot guidance expected in November.

Southwest and United said they will not accept new aircraft with the affected software and are opting for an earlier version. Southwest said none of its fleet carries Version U.14 . The complication is certification: the FAA certified the MAX 7 in early August with the newest software, and it was not immediately clear whether it can be delivered with an older version . The MAX 10 used version 14.1 in testing, and CEO Kelly Ortberg said this month he expected its certification "very soon" .

The FAA has not said whether its review will affect the MAX 10 certification schedule, so no delay is confirmed. Key items to watch are the FAA's findings, whether MAX 7 deliveries can proceed on older software, and MAX 10 approval timing for customers such as Alaska Airlines. There are 2,430 MAX aircraft in service globally, per Cirium .