Document ID: chunk:federal_register_of_legislation:F2022L01489:body:0:p2
Version: federal_register_of_legislation:F2022L01489
Segment Type: other
Provision Reference: 
Character Range: 2953–3931

process sheets for the pistons and there is no proof that the test specimens are fully representative of the process applied to the pistons. This issue can cause internal hydrogen embrittlement and cause cracking after incorrect treatment. Hydrogen embrittlement may lead to a failure of the MLG axle piston resulting in dual wheel separation.
                The effected AeroNikl components were required to be removed from service in accordance with Fokker all operator message AOF100.230 #3 before 1 March 2022. The subject CASA AD supports the requirements stated within the Fokker all operator message.
                EASA has requested that the remainder Atotech effected components be removed from service before the 1 February 2024 to ensure that the airworthiness of the Australian F28 fleet is safeguarded, and that the affected units are not introduced into the worldwide supply chain.

David Punshon
Delegate of the Civil Aviation Safety Authority
24 October 2022