Hydraulic Power - Hydraulic Tubing / Check Valve / Flight Control Software - Installation
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must install the specified hydraulic tubing, pressure-operated check valve, and updated flight control software as detailed in the referenced Boeing service bulletins. Compliance with this AD is mandatory by June 6, 2019. Operators should consult the latest Boeing service bulletins and information notices for detailed instructions and verify software versions are approved for installation.
Summary
Federal Aviation Administration Airworthiness Directive 2019-08-05 is a final rule addressing certain Boeing 787-8 and 787-9 airplanes. It mandates the installation of hydraulic tubing, a pressure-operated check valve, and updated flight control software to mitigate risks associated with damage in tire/wheel threat zones. This directive aims to prevent loss of braking on one main landing gear truck, loss of nose wheel steering, and loss of directional control on the ground at low speeds.
What changed
This new airworthiness directive introduces requirements for installing specific hydraulic components and updated flight control software on affected Boeing 787-8 and 787-9 models. It incorporates corrections and clarifications from Boeing service bulletins and information notices to ensure accurate compliance instructions. Additionally, it allows the use of later-approved software versions for certain software installations.
Why it matters
This directive is critical for aviation professionals as it addresses a safety risk that could lead to runway excursions due to loss of directional control on the ground. Operators and maintenance teams must implement these modifications to maintain airworthiness and comply with FAA regulations. Ensuring adherence to this AD helps prevent potential accidents related to tire or wheel damage impacting braking and steering systems.
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