# Airworthiness Directives; Airbus SAS Airplanes
> **Rule** · Final rule. · Published 2021-08-05 · Effective 2021-09-09 · 86 FR 42687
## Document
- **Document number:** 2021-16564
- **Category:** airworthiness
- **Manufacturer:** Airbus SAS
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 42687
- **Publication date:** 2021-08-05
- **Effective date:** 2021-09-09
- **FAA docket:** Docket No. FAA-2021-0131
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Airbus SAS Model A330-200, -300, -800, and -900 series airplanes; and Model A340-200, -300, -500, and -600 series airplanes. This AD was prompted by reports that certain oxygen supply solenoid valves are a potential source of increased flow resistance within the flightcrew oxygen system. This AD requires a special detailed inspection (flow test) of certain solenoid valves, and replacement if necessary, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/08/05/2021-16564/airworthiness-directives-airbus-sas-airplanes)
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