EASA AD US-2023-13-11
SUPERSEDED BY FAA AD 2024-19-15
Airworthiness Directive 2023-13-11 is a final rule issued by the FAA addressing certain AVOX Systems Inc. (formerly Scott Aviation) oxygen cylinder and valve assemblies, as well as oxygen valve assemblies installed on various transport category airplanes including Boeing models. This directive requires inspections to determine serial numbers and detailed inspections of the gap between the packing retainer and valve body, with replacement of assemblies found to have unacceptable gaps. It also limits installation of affected parts and mandates reporting and returning certain assemblies to the manufacturer.