The European Union Aviation Safety Agency on Friday issued an Emergency Airworthiness Directive for the Airbus A320 family to address a susceptibility introduced by a software update in one of its onboard computers.

Delta and American Airlines are among the major air carriers that are responding to an “urgent” safety update relating to Airbus planes after an airplane experienced a “pitch down” event.

Airbus issued an urgent directive on a “significant number" of A320 family aircraft, potentially disrupting travel. Here’s what we know.

Global airlines scrambled to fix a software glitch on Airbus A320 jets on Saturday as a partial recall by the European planemaker halted hundreds of flights in Asia and Europe and threatened U.S. travel over the busiest weekend of the year.

Airbus has almost returned all A320 jets to service after implementing urgent software fixes due to a solar radiation vulnerability. Under 100 remain grounded.

The Federal Aviation Administration is preparing to mirror EASA's emergency airworthiness directive requiring Airbus A320-family aircraft receive software updates before further flight, following a solar radiation interference incident that affected a JetBlue flight in October.

A solar radiation–linked software flaw in Airbus A320 jets triggered urgent global fixes, causing possible delays but no safety risk for travelers.