EASA AD 2020-0027R1
Flight Controls — Aileron, Elevator and Rudder Electro-Hydrostatic Actuators — Inspection / Replacement
Summary
EASA Airworthiness Directive 2020-0027R1 is an updated regulatory requirement addressing inspection and replacement of Electro-Hydrostatic Actuators (EHAs) for the aileron, elevator, and rudder flight controls on Airbus A350-941 and A350-1041 aircraft. The directive mandates insulation resistance checks and corrective actions for affected EHAs to ensure continued safe operation of these flight control components.
What Changed
EASA Airworthiness Directive 2020-0027R1 revises the previous AD 2020-0027 by correcting a paragraph reference error and refining the definition of affected EHAs. It retains the original inspection and replacement requirements while clarifying compliance instructions and removing incorrect references.
Why It Matters
This directive is critical for aviation professionals as it addresses a potential safety risk caused by moisture ingress degrading insulation resistance in the DDSOV of EHAs, which could impair flight control functionality. Operators and maintenance teams must comply to prevent possible loss of control and ensure regulatory adherence for continued airworthiness of Airbus A350 aircraft.
What To Do
Operators of Airbus A350-941 and A350-1041 aircraft must perform insulation resistance checks on affected EHAs within specified timeframes, replace or re-identify EHAs based on test results, and report findings to Airbus. Installation of affected EHAs is prohibited from the effective date. Compliance deadlines include initial checks within three months after 700 flight hours or 30 days after the AD effective date, with follow-up inspections and actions as detailed in the directive.
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