Southwest Airlines first to introduce retractable barrier to protect cockpit

On Friday, 29 August 2025, Southwest Airlines made its first flight with a retractable barrier in place. The installation is meant to protect the cockpit when the pilot must step out during the flight.

Since 11 September 2001, flight deck security standards have been at the centre of the Federal Aviation Administration’s decision-making. While a lot has changed over the years to improve security – including tougher cockpit doors, a screening of checked baggage, and armed air marshals – there are still improvements to be made.

The FAA’s latest move requires all new aircraft in the United States to be equipped with retractable barriers by August 2026. While the measure was first announced in 2023 and should have been implemented by the summer of 2025, that deadline was postponed by a year. That decision was made partly because of arguments made by Airlines for America, which said the barriers had not yet been certified and that procedures hadn’t been agreed upon.

While most airlines will thus only be equipping their new aircraft with the feature by August 2026, Southwest Airlines deployed its first installed physical secondary barrier (IPSB) on a new Boeing 737 on 29 August 2025. By the end of the year, 26 aircraft should be equipped with the barrier.

“For Southwest, this was the right decision. We have a robust safety management system that takes a proactive approach when it comes to enhancing safety wherever possible. We recently were the first airline to begin requiring customers to keep lithium battery chargers in sight while they are in use. We also took the proactive step of buttoning up our cabin service at 18,000 feet to help prevent turbulence injuries”, Southwest Airlines said in a statement.

Protecting everyone on board

The barrier will not be used for most of the flight but only when the pilot steps out of the cockpit, for example, in order to use the bathroom, leaving that door open and vulnerable to intruders. At that moment, the cabin crew will be able to. Close the barrier, thus creating a physical obstruction between the cockpit and the main cabin. Until now, many airlines have used a beverage cart to obtain a similar effect.

“Secondary flight deck barriers are just one of the many critical safety and security measures Alpa is advocating for. The flight deck is most vulnerable when the cockpit door is open during flight. These lightweight, retractable barriers provide an added layer of protection in those moments, helping prevent potential breaches. This isn’t just about policy, it’s about protecting the flight deck, the crew and everyone on board”, stated Air Line Pilots Association International regarding the matter.

At the moment, the FAA will only require new aircraft to be equipped with the so-called IPSB as of August 2026. Retrofitting is thus not a must, meaning many planes will not feature a retractable barrier over the coming years.