# Airworthiness Directives; Airbus SAS Airplanes
> **Rule** · Final rule. · Published 2018-11-14 · Effective 2018-12-19 · 83 FR 56704
## Document
- **Document number:** 2018-24688
- **Category:** airworthiness
- **Manufacturer:** Airbus SAS
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 56704
- **Publication date:** 2018-11-14
- **Effective date:** 2018-12-19
- **FAA docket:** Docket No. FAA-2018-0297
## Abstract

We are adopting a new airworthiness directive (AD) for certain Airbus SAS Model A319 series airplanes; Model A320-211, -212, -214, - 231, -232, and -233 airplanes; and Model A321-111, -112, -131, -211, - 212, -213, -231, and -232 airplanes. This AD was prompted by investigations that revealed that the cover seal of the brake dual distribution valve (BDDV) was damaged and did not ensure efficient sealing. This AD requires identifying the BDDV part number installed on the airplane, and modifying or replacing BDDVs having certain part numbers. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/11/14/2018-24688/airworthiness-directives-airbus-sas-airplanes)
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