Airworthiness Directives; Airbus Airplanes

We are superseding Airworthiness Directive (AD) 2014-13-12 for all Airbus Model A318, A319, A320, and A321 series airplanes. AD 2014- 13-12 required identifying the part number and serial number of each passenger oxygen container, replacing the oxygen generator manifold of any affected oxygen container with a serviceable manifold, performing an operational check of the manual mask release, and doing corrective actions if necessary. This new AD retains the requirements of AD 2014- 13-12, and requires replacing the oxygen generator manifold of any affected DAe oxygen container with a serviceable manifold. This AD was prompted by reports of silicon particles inside the oxygen generator manifolds, which had chafed from the mask hoses during installation onto the generator outlets. We are issuing this AD to address the unsafe condition on these products.