Boeing 737 MAX Software Glitch Affects Autopilot, Prompts FAA Review

Boeing has discovered a software glitch in its 737 MAX aircraft that can disable an automated navigation function during a specific landing procedure, prompting a review by the Federal Aviation Administration (FAA). The issue has also led major U.S. carriers to request that Boeing deliver new aircraft with an older version of the software, The Wall Street Journal reported Saturday.

The Glitch Explained

The flaw emerged following a recent cockpit software update and can manifest when pilots execute a missed approach, a procedure where a landing is aborted and the flight path is changed. According to the report, the glitch can result in the loss of some autopilot functions at low altitudes, potentially requiring the flight crew to fly the aircraft manually under certain circumstances.

Boeing notified 737 MAX operators of the issue in late August, stating in a company document that it did not believe the flaw posed a safety risk. The manufacturer is reportedly developing a permanent software fix and has outlined a procedure for pilots to restore the automated navigation function if it becomes disabled.

Industry and Regulatory Response

In response to the discovery, both Southwest Airlines and United Airlines have asked Boeing not to deliver new 737 MAX jets with the affected software, according to industry officials cited by the Journal. The airlines have requested that new aircraft be equipped with an earlier software version until a fix is implemented.

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The FAA is now investigating the matter. A senior agency official told the newspaper that the regulator will take action if deemed necessary. Boeing initially learned of the glitch in November 2024 but determined it did not warrant a formal safety review at the time. Following further feedback from airlines, the company initiated a formal review this month and shared its findings with the FAA.

Broader Implications

Boeing is now working to accelerate the permanent software solution, which was originally scheduled for early 2028. The issue could also have wider consequences for the 737 MAX program, potentially affecting the ongoing certification of the MAX 10 variant and the service introduction of the MAX 7.

The Wall Street Journal reported it was unclear how many aircraft in service are currently operating with the affected software. The development adds another layer of scrutiny to the 737 MAX program, which has faced significant oversight following earlier software-related issues.