Southwest Airlines has introduced a secondary barrier outside cockpit doors, marking a significant shift in aviation security protocols. The measure, which includes a retractable folding door to block access to the flight deck and front galley, aims to enhance safety by providing an additional layer of protection.

The airline’s decision comes 25 years after the September 11 attacks, during which hijacked planes were used as weapons. While cockpit doors were reinforced following the 9/11 terrorist strikes, new regulations requiring secondary barriers for all aircraft have only recently begun to take effect. Southwest’s newly delivered Boeing 737 MAX features the system, with the airline stating that future aircraft will also include the upgrade.

Justin Jones, Southwest’s Executive Vice President of Operations, highlighted the barrier’s purpose, noting it offers “an additional layer of protection anytime our pilots need to come out of the flight deck.” The measure replaces current practices, such as using beverage carts to block aisles when pilots exit the cockpit.

The airline emphasized its commitment to safety, citing a proactive approach to security enhancements. However, no certified method currently exists to retrofit existing planes with the barriers, though Southwest claims ongoing discussions with Boeing and the Federal Aviation Administration.

The implementation follows a 2018 congressional mandate requiring secondary barriers on new airliners, which is set to become effective next year. Pilot unions have advocated for universal adoption of the measure across all aircraft.