Boeing 737 MAX Navigation Glitch Delays Fix Until 2028

The Boeing Company is developing a permanent software fix, expected in early 2028, for a newly disclosed navigation glitch on the Boeing 737 MAX that disables automated vertical navigation following a missed approach. The issue has prompted major operators to request deliveries with older software versions and could complicate certification timelines for the final two variants of the MAX family.

According to reporting by The Wall Street Journal on September 26, 2026, Boeing first became aware of the anomaly in November 2024 but did not formally notify operators until August 2026. The Federal Aviation Administration (FAA) is currently assessing the situation and plans to convene a Corrective Action Review Board to determine the appropriate regulatory response.

Operational impact and airline response

The software anomaly affects the aircraft’s automated vertical navigation capabilities specifically during a landing attempt that follows a go-around. While Boeing stated the issue does not pose an immediate safety risk, it requires pilots to manually intervene or follow specific procedures to restore the automated functions.

Southwest Airlines (WN) and United Airlines (UA) have responded to the August 2026 notification by requesting that Boeing deliver their new Boeing 737 MAX aircraft equipped with an older, unaffected version of the flight control software. Boeing confirmed it is collaborating with carriers to establish formal procedures allowing flight crews to reenable the automated systems if the glitch occurs in flight.

“We shared information with operators that reinforced existing pilot procedures for safely handling such cases,” Boeing stated, adding that engineers are developing a permanent software update.

Regulatory scrutiny and certification timelines

The FAA is monitoring the software anomaly through its Corrective Action Review Board process. The regulator noted it will mandate immediate action if the review identifies an active safety concern for the current in-service fleet.

The disclosure introduces potential hurdles for the pending certification of the Boeing 737 MAX 7 and Boeing 737 MAX 10. According to The Air Current, the FAA review of the software issue could delay the regulatory approval required to bring these final two MAX variants into commercial service.

AirPro News analysis

We note that the timeline between Boeing’s initial discovery of the software issue in November 2024 and its operator notification in August 2026 is likely to draw intense scrutiny from the FAA. While the glitch involves a specific and relatively rare flight profile, any software anomaly affecting automated flight path management on the 737 MAX carries heavy historical and regulatory weight. The requests from Southwest and United to revert to older software versions indicate a strong operator preference for known, stable configurations over newer iterations carrying unmitigated bugs.

Sources: The Wall Street Journal