FAA approves provisions for A321XLR's novel fuel tank to address fire risk • airlinerwatch.com
UPDATE 2-U.S. approves conditions for Airbus A321XLR to address fire risks • kalkinemedia.com
FAA sets design requirements for Airbus A321XLR tank • AirInsight
U.S. approves conditions for Airbus A321XLR to address fire risks • Financial Post
U.S. approves conditions for Airbus A321XLR to address fire risks | Business • devdiscourse.com