{"id":"F2009L02829","name":"AD/ECUREUIL/34 - Main Rotor Head, Main Gearbox and Landing Gear - CANCELLED","slug":"ad-ecureuil-34-main-rotor-head-main-gearbox-and-landing-gear-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":80102,"registerId":"commonwealth-F2009L02829-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter AS 350 (Ecureuil) Series Heli","sectionType":"division","heading":"Eurocopter AS 350 (Ecureuil) Series Helicopters","content":"### Eurocopter AS 350 (Ecureuil) Series Helicopters\n\n| AD/ECUREUIL/34 | Main Rotor Head, MainGearbox and Landing Gear | 8/2009 |\n| -------------- | --------------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                            |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 30 July 2009.                                                                                                                                                                                                                                                 |\n| Background:  | This unique Australian AD specified actions at each periodic (T) inspection, and after any occurrence of self-sustained dynamic excitation of the helicopter on the ground. Actions were as specified in MET work cards. Using an AD to mandate these actions is no longer justified. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n18 June 2009","sortOrder":0},{"sectionNumber":"AD/ECUREUIL/34","sectionType":"part","heading":"AD/ECUREUIL/34","content":"## AD/ECUREUIL/34","sortOrder":1},{"sectionNumber":"Main Rotor Head, MainGearbox and Landing","sectionType":"part","heading":"Main Rotor Head, MainGearbox and Landing Gear","content":"## Main Rotor Head, Main  \nGearbox and Landing Gear","sortOrder":2},{"sectionNumber":"8/2009","sectionType":"part","heading":"8/2009","content":"## 8/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2081},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the regulatory scope of the previous Airworthiness Directive rather than expanding it. The scope remains confined to the Eurocopter AS 350 helicopter series, but the legal effect is the complete removal of the previous maintenance mandate rather than any broadening of subject matter or application."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","No cross-references to other legislation beyond the self-referential cancellation","No conditional logic or exceptions","Extremely short length (under 200 words of operative text)"],"plain_english_summary":"**What this does:** This document officially cancels a previous aviation safety rule (Airworthiness Directive 34) that applied to specific Eurocopter AS 350 helicopters—commonly known as the 'Squirrel' or 'Ecureuil'.\n\n**What the old rule required:** The cancelled directive previously forced helicopter owners and mechanics to perform specific safety checks on the **main rotor head**, **main gearbox**, and **landing gear** during regular periodic inspections. It also required checks after any incident where the helicopter shook or vibrated excessively while on the ground (called 'self-sustained dynamic excitation').\n\n**Why it changed:** The Civil Aviation Safety Authority (CASA) decided that forcing these actions through a formal Directive was no longer necessary or justified. The safety tasks may still be required under normal maintenance rules, but they're no longer mandated by this specific legal instrument.\n\n**Who is affected:** Owners and operators of Eurocopter AS 350 series helicopters registered in Australia."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ecureuil-34-main-rotor-head-main-gearbox-and-landing-gear-cancelled","history":"/api/acts/ad-ecureuil-34-main-rotor-head-main-gearbox-and-landing-gear-cancelled/history","analysis":"/api/acts/ad-ecureuil-34-main-rotor-head-main-gearbox-and-landing-gear-cancelled/analysis","conflicts":"/api/acts/ad-ecureuil-34-main-rotor-head-main-gearbox-and-landing-gear-cancelled/conflicts","importantCases":"/api/acts/ad-ecureuil-34-main-rotor-head-main-gearbox-and-landing-gear-cancelled/important-cases","documents":"/api/acts/ad-ecureuil-34-main-rotor-head-main-gearbox-and-landing-gear-cancelled/documents"}}