Boeing 737 MAX Hit By Software Glitch, US Aviation Regulator Launches Review

Boeing has identified a software glitch on some 737 MAX aircraft that could disable automated vertical navigation during a landing after a missed approach, prompting a review by the US Federal Aviation Administration (FAA).

The problem is linked to an update to the aircraft’s flight management computer and can occur when pilots change their programmed flight path after abandoning a landing attempt. In certain circumstances, the VNAV system, which helps manage the aircraft’s planned altitude and flight path, could disengage and shift to a less sophisticated pitch-control mode.

Boeing said pilots are trained to safely operate without VNAV and that the issue does not pose an immediate safety risk. However, the problem could increase cockpit workload at low altitude, particularly when crews are dealing with bad weather or other demanding conditions. Importantly, Boeing said the autopilot can continue functioning even if VNAV disengages.

The issue was first reported to Boeing by an airline in November 2024. The company initially determined that it did not meet the threshold for a formal safety review. After receiving additional information from operators, Boeing launched a formal review and shared its findings with the FAA this month.

Boeing notified 737 MAX operators about the issue in late August and reinforced existing procedures for handling the situation. The affected software includes versions 14 and 14.1 of the flight management computer system. Boeing is developing a permanent fix, initially expected in early 2028, but is now working to accelerate it.

The FAA said it will convene a Corrective Action Review Board and take immediate action if it identifies a safety concern. The agency is working with Boeing and airlines to determine the extent of the issue and how widely the affected software is installed.

Southwest Airlines and United Airlines have asked Boeing not to deliver new 737 MAX aircraft with the affected software and instead requested an earlier version. Alaska Airlines, American Airlines, Southwest and United have told CBS News that none of their in-service MAX aircraft use the affected software.

The issue could complicate Boeing’s plans for the MAX 7 and MAX 10. The FAA approved the MAX 7 last month, while certification of the MAX 10 is still pending. It remains unclear how many aircraft worldwide carry the affected software.