Integrated Modular Avionics – Ethernet Network – Inspection
Superseded. A newer version replaces this document.
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform the initial functional check within 55 flight hours after 15 July 2022 and repeat inspections every 110 flight hours thereafter. Any detected discrepancies require immediate corrective action before the next flight. Additionally, after any maintenance involving Ethernet network connectors or any MFD failure, checks must be conducted before flight. If issues persist, operational limitations prohibiting flight in IMC and night VMC must be implemented until resolved.
Summary
EASA Airworthiness Directive 2022-0143 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting Airbus Helicopters Deutschland GmbH EC135, EC635, MBB-BK117, Airbus Helicopters EC 175 B, and H160-B helicopters. The directive addresses design deficiencies in the Integrated Modular Avionics Ethernet network that have caused multiple Multi-Function Display failures. It mandates inspections and corrective actions to ensure continued safe operation of these helicopter models.
What changed
EASA Airworthiness Directive 2022-0143 introduces mandatory repetitive functional checks of the Integrated Modular Avionics Ethernet network on the affected helicopter models. It requires operators to perform maintenance and operational mode test procedures, troubleshoot discrepancies, and apply operational limitations if issues cannot be resolved. This directive is an interim safety action pending further regulatory updates.
Why it matters
This directive is critical for aviation professionals as it addresses a potential safety risk that could reduce pilot situational awareness and helicopter control due to avionics failures. Operators and maintenance organizations must comply to prevent in-flight Multi-Function Display failures and ensure regulatory compliance. Failure to adhere could lead to operational restrictions and increased safety risks.
More for Airbus Helicopters EC175
All 73- EASA AD 2026-0179Tail Rotor – Tail Rotor Blade – Service Life Limit Amendment / ReplacementSep 18, 2026
- EASA PAD 26-090Tail Rotor – Tail Rotor Blade – Service Life Limit Amendment / ReplacementJul 24, 2026
- EASA AD 2026-0110[Correction] Fuselage – Screws and Nuts installed on Firewalls – InspectionJun 10, 2026
- EASA AD 2026-0039Time Limits / Maintenance Checks — Airworthiness Limitations Section — AmendmentFeb 27, 2026
- EASA PAD 26-026
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