# Airworthiness Directives; Embraer S.A. (Type Certificate Previously Held by Yaborã Indústria Aeronáutica S.A.; Embraer S.A.) Airplanes
> **Rule** · Final rule; request for comments. · Published 2025-03-28 · Effective 2025-04-14 · 90 FR 14029
## Document
- **Document number:** 2025-05331
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 90 FR 14029
- **Publication date:** 2025-03-28
- **Effective date:** 2025-04-14
- **FAA docket:** Docket No. FAA-2025-0471
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Embraer S.A. Model ERJ 190-300 and ERJ 190-400 airplanes. This AD was prompted by a report of a MAU 3B failure which led to brake fault advisory messages followed by loss of normal braking that was undetected until the brakes were pressed by the pilots. This AD requires revising the existing airplane flight manual (AFM) to incorporate procedures associated with the failure of certain modular avionics units (MAUs), as specified in an Ag[ecirc]ncia Nacional de Avia[ccedil][atilde]o Civil (ANAC) 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/2025/03/28/2025-05331/airworthiness-directives-embraer-sa-type-certificate-previously-held-by-yabor-indstria-aeronutica-sa)
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