# Airworthiness Directives; Airbus SAS Airplanes
> **Rule** · Final rule. · Published 2024-01-03 · Effective 2024-02-07 · 89 FR 258
## Document
- **Document number:** 2023-28851
- **Category:** airworthiness
- **Manufacturer:** Airbus SAS
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 89 FR 258
- **Publication date:** 2024-01-03
- **Effective date:** 2024-02-07
- **FAA docket:** Docket No. FAA-2023-1882
## Abstract

The FAA is superseding Airworthiness Directive (AD) 2022-07- 15, which applied to all Airbus SAS Model A318, A319, A320, and A321 series airplanes. AD 2022-07-15 required replacing affected braking and steering control units (BSCUs) and revising the operator's existing FAA-approved minimum equipment list (MEL). This AD was prompted by a determination that a type 1 relay combined with an affected BSCU would induce BSCU freezing. This AD removes certain airplanes from the applicability, retains the requirements of AD 2022-07-15, requires an inspection for the relay type installed and replacement of type 1 relays with type 2 relays, limits the installation of affected BSCUs on certain airplanes and prohibits the installation of affected BSCUs for certain other airplanes 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/2024/01/03/2023-28851/airworthiness-directives-airbus-sas-airplanes)
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