Airbus A350 operators must update their emergency equipment lists

US aviation regulators are forcing operators of certain Airbus A350 airplanes to update their minimum equipment lists. This means airlines must remove some items from the list of equipment that can be broken or missing before a flight.

Airlines use a "minimum equipment list" to decide if a plane is safe to fly even if some parts are not working. This rule means that some items previously allowed to be broken must now be fixed before takeoff. This makes flights safer, but it also means more delays or cancellations for airlines operating these specific Airbus models.