# Airworthiness Directives; Airbus SAS Airplanes
> **Rule** · Final rule. · Published 2018-10-09 · Effective 2018-11-13 · 83 FR 50482
## Document
- **Document number:** 2018-21464
- **Category:** airworthiness
- **Manufacturer:** Airbus SAS
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 50482
- **Publication date:** 2018-10-09
- **Effective date:** 2018-11-13
- **FAA docket:** Docket No. FAA-2018-0301
## Abstract

We are adopting a new airworthiness directive (AD) for all Airbus SAS Model A300 series airplanes; Model A300 B4-600, B4-600R, and F4-600R series airplanes, and Model A300 C4-605R Variant F airplanes (collectively called Model A300-600 series airplanes); and Model A310 series airplanes. This AD was prompted by a report of yellow hydraulic system failure, including both braking accumulators, due to failure of the parking brake operated valve (PBOV). This AD requires replacement of a certain PBOV with a different PBOV. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/10/09/2018-21464/airworthiness-directives-airbus-sas-airplanes)
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