FAA probes Boeing 737 Max software issue that may affect go-around procedures

The Federal Aviation Administration has opened an investigation into a software anomaly affecting some Boeing 737 MAX jets. The problem, found in flight-management computer versions 14 and 14.1, can cause the vertical navigation (VNAV) function to disengage when pilots execute a go-around while using a precision approach with autopilot engaged. Although autopilot remains operational, pilots would need to manage pitch manually, adding workload during a critical phase of flight.

"Last month, we informed all 737 operators about a software issue where pilots may not have access to automated flight guidance during a specific landing scenario," a Boeing spokesperson said. "We shared information with operators that reinforced existing pilot procedures for safely handling such cases. Our engineers are working on a software update to permanently address the issue."

The agency said it will convene a Corrective Action Review Board and will act promptly if a safety concern is identified. Several U.S. carriers, including Southwest, United, Alaska and American Airlines, have confirmed that their in-service fleets do not use the affected software version, and Southwest and United have declined delivery of new aircraft equipped with it.

Boeing initially indicated the glitch was not an immediate safety risk and projected a software fix for 2028, with updated pilot guidance slated for November. The company now aims to accelerate both the fix and the guidance. The FAA review could affect the timing of certification for the larger 737 MAX 10 and deliveries of the recently certified MAX 7.

The issue was first reported by the Wall Street Journal, and the FAA is working closely with Boeing and airlines to assess any further impact on operations.