📌 Southwest Among the First to Install Second Cockpit Door Southwest Airlines has begun installing a second cockpit door, or secondary flight deck barrier, on its new aircraft. This is a significant safety upgrade that will be a standard feature on all new commercial aircraft delivered to U.S. airlines by an FAA-mandated deadline of August 2026. The FAA officially ordered secondary cockpit barriers to be mandatory on June 14, 2023. Southwest became one of the first U.S. carriers to operate a pa