EASA AD BR-2020-05-02
Flight Controls - Horizontal Stabilizer Control Yoke Assemblies - Modification
Summary
Brazilian Airworthiness Directive 2020-05-02 is a regulatory document issued by the Agência Nacional de Aviação Civil (ANAC) that applies to Yaborã Indústria Aeronáutica S.A. ERJ 190 series airplanes equipped with specific Embraer Control Yoke Assemblies. It addresses a safety issue related to the incorrect installation of horizontal stabilizer pitch trim switches on the control yokes. The directive mandates modifications to prevent reversed pitch trim commands.
What Changed
This directive introduces a mandatory modification requiring the installation of supports on the control yokes to prevent incorrect installation of the horizontal stabilizer pitch trim switches. It also prohibits the installation of certain Embraer Control Yoke Assemblies after the modification date. Additionally, it provides credit for previous partial or full compliance with earlier service bulletin revisions.
Why It Matters
This directive is critical for maintaining safe flight control operations by ensuring that horizontal stabilizer pitch trim commands are correctly executed. Operators and maintenance organizations must comply to avoid potential control issues that could compromise flight safety. Compliance ensures regulatory adherence and prevents the use of non-compliant control yoke assemblies.
What To Do
Operators of affected ERJ 190 models must install the required supports and reidentify control yokes within 18 months from the effective date of 26 May 2020, following the specified Embraer service bulletins. They must also record compliance in maintenance logs and seek approval for any alternative methods of compliance from ANAC's certification branch.
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