Airbus must replace all old oxygen cylinders on its A350 planes

The US aviation regulator is tightening rules for oxygen cylinders on Airbus A350 airplanes. All older, potentially faulty oxygen cylinder assemblies must be replaced with a new, redesigned version.

This rule means airlines operating Airbus A350s must spend money to replace specific parts, even if those parts have not yet failed. It removes a known risk by mandating a hardware upgrade across an entire fleet. This is a common way regulators ensure safety after a design flaw is identified.