EASA AD BR-2024-08-02: Main Door Lock Sensor - Inspection

What to do

Operators of Embraer EMB-545 and EMB-550 aircraft must perform an operational test of the main door sensors and lubricate the sensor mechanisms within 12 months from the effective date of August 23, 2024. The operational test must be repeated every 12 months, and lubrication every 24 months thereafter. Maintenance must follow the specified tasks in the Aircraft Maintenance Manual and any sensor faults must be corrected or parts replaced as directed.

Summary

Brazilian Airworthiness Directive AD No. 2024-08-02 is a regulatory document issued by the Agência Nacional de Aviação Civil (ANAC) that applies to all Embraer S.A. airplanes model EMB-545 and EMB-550. It mandates inspection and maintenance procedures for the main door lock sensor to ensure proper operation and prevent false locked door indications. This directive aims to enhance flight safety by addressing potential sensor jamming failures.

What changed

This new airworthiness directive introduces mandatory operational testing and lubrication of the main door lock sensors on Embraer EMB-545 and EMB-550 aircraft. It specifies detailed inspection tasks, sensor replacement criteria, and repetitive maintenance intervals to mitigate the risk of sensor jamming and false door lock indications. The directive also provides instructions for alternative methods of compliance subject to ANAC approval.

Why it matters

This directive is critical for aviation professionals because it addresses a latent failure mode that could lead to in-flight door opening due to incorrect cockpit indications. Operators and maintenance organizations must comply to maintain aircraft airworthiness and ensure passenger safety. Compliance helps prevent operational errors related to door locking status, which is a key safety requirement.

What to do

Summary

What changed

Why it matters

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