Rotors Flight Control — Main Rotor Servo Actuators — Inspection
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must inspect each affected main rotor servo actuator within 55 flight hours after 12 August 2019, following the applicable Airbus Helicopters Emergency Alert Service Bulletin instructions. Defective parts must be replaced before the next flight, and slip-marks must be inspected within 15 flight hours after accumulating 150 flight hours post-inspection. Only serviceable parts may be installed from the effective date onward.
Summary
EASA Airworthiness Directive 2019-0184 is an airworthiness directive addressing the inspection of main rotor servo actuators on Airbus Helicopters models SA 365, AS 365, EC155, AS 350, EC 130, and AS355. The directive targets specific part numbers of main rotor servo actuators to ensure the correct installation of the threaded-shouldered bushing to prevent potential loss of helicopter control.
What changed
This new airworthiness directive introduces a one-time inspection requirement for affected main rotor servo actuators to verify the correct installation of the threaded-shouldered bushing. It mandates replacement of defective parts before further flight and periodic inspection of slip-marks to ensure continued safety. The directive also allows installation of only serviceable parts from the effective date onward.
Why it matters
This directive is critical for aviation professionals because it addresses a safety issue that could lead to loss of control of the helicopter if undetected. Operators and maintenance organizations must comply to ensure continued airworthiness and safe flight operations. Compliance helps prevent in-flight failures and supports regulatory adherence under EU aviation safety regulations.
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