EASA AD BR-2025-04-02: Aircraft Flight Manual - Amendment

What to do

Operators must revise the AFM abnormal and emergency procedures within 10 days from August 19, 2024, by incorporating the specified procedural changes. Additionally, the BCM software must be updated within 12 months from the AD effective date of April 23, 2025, following Embraer Service Bulletin 190E2-32-0023 revision 01. After the software update, the AFM procedure modifications can be removed. Compliance must be recorded in maintenance logs.

Summary

The Brazilian Airworthiness Directive AD No. 2025-04-02 is an amendment issued by the Agência Nacional de Aviação Civil (ANAC) that applies to all Embraer S.A. ERJ 190-300 and ERJ 190-400 aircraft. This directive mandates updates to the Aircraft Flight Manual (AFM) procedures related to AVIONICS MAU 1A and MAU 3B failures and requires a software update to the Brake Control Module (BCM).

What changed

This AD cancels and supersedes AD 2024-08-01 and introduces a software modification to the Brake Control Module as a terminal action. It also revises AFM procedures to address failures of the MAU 3B and MAU 1A that could lead to loss of normal braking during landing. The updated procedures include specific guidance for brake failure scenarios and landing configurations under abnormal conditions.

Why it matters

This directive is critical for flight safety as it addresses a failure mode that can cause unannounced loss of normal brakes, increasing the risk of runway excursions. Operators and maintenance teams must ensure compliance to prevent brake system failures that could compromise aircraft control during landing. The updated AFM procedures and BCM software update improve pilot response and aircraft braking reliability.

What to do

Summary

What changed

Why it matters

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