{"id":"F2009L04220","name":"AD/ARRIEL/27 - HP Turbine (Module M03) - Turbine Blade Displacement - CANCELLED","slug":"ad-arriel-27-hp-turbine-module-m03-turbine-blade-displacement-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":81910,"registerId":"commonwealth-F2009L04220-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Turbomeca Turbine Engines - Arriel Serie","sectionType":"division","heading":"Turbomeca Turbine Engines - Arriel Series","content":"### Turbomeca Turbine Engines - Arriel Series\n\n| AD/ARRIEL/27 | HP Turbine (Module M03) - TurbineBlade Displacement | 23/2009 |\n| ------------ | --------------------------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                      |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 23 November 2009.                                                                                                                                                                                                                       |\n| Background:  | A State of Design airworthiness directive issued on or after 1 October 2009 is defined as an airworthiness directive per CASR Part 39.001A. The requirements of this airworthiness directive have been superseded by EASA AD 2007-0109R1 issued9 November 2009. |\n\n![](image.001.png)\n\nWilliam David  \nDelegate of the Civil Aviation Safety Authority\n\n11 November 2009","sortOrder":0},{"sectionNumber":"AD/ARRIEL/27","sectionType":"part","heading":"AD/ARRIEL/27","content":"## AD/ARRIEL/27","sortOrder":1},{"sectionNumber":"HP Turbine (Module M03) - TurbineBlade D","sectionType":"part","heading":"HP Turbine (Module M03) - TurbineBlade Displacement","content":"## HP Turbine (Module M03) \\- Turbine  \nBlade Displacement","sortOrder":2},{"sectionNumber":"23/2009","sectionType":"part","heading":"23/2009","content":"## 23/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1504},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the previous regulatory requirements rather than expanding them. The scope has been reduced to nil as the safety standards are now maintained through an adopted State of Design directive under CASR Part 39.001A."},"complexity_factors":["Single operative provision (cancellation only)","No substantive requirements, conditions, or exceptions","No defined terms or interpretation sections","Minimal cross-referencing (only cites the superseding European directive)"],"plain_english_summary":"This legislation **cancels** a previous aircraft safety rule (Airworthiness Directive AD/ARRIEL/27) that required checks on turbine blades in specific helicopter engines.\n\n**What it does:**\n- Removes the requirement for operators to inspect or repair High Pressure (HP) turbine blade displacement in Turbomeca Arriel series engines\n- The cancellation took effect on 23 November 2009\n\n**Who it affects:**\n- Owners and operators of helicopters powered by Turbomeca Arriel turbine engines\n- Maintenance organisations working on these engines\n\n**Why it matters:**\nThe old Australian safety rule is no longer needed because a European aviation safety directive (EASA AD 2007-0109R1) now automatically applies to these engines in Australia under the Civil Aviation Safety Regulations. This avoids duplicate rules and aligns Australian standards with international regulations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-arriel-27-hp-turbine-module-m03-turbine-blade-displacement-cancelled","history":"/api/acts/ad-arriel-27-hp-turbine-module-m03-turbine-blade-displacement-cancelled/history","analysis":"/api/acts/ad-arriel-27-hp-turbine-module-m03-turbine-blade-displacement-cancelled/analysis","conflicts":"/api/acts/ad-arriel-27-hp-turbine-module-m03-turbine-blade-displacement-cancelled/conflicts","importantCases":"/api/acts/ad-arriel-27-hp-turbine-module-m03-turbine-blade-displacement-cancelled/important-cases","documents":"/api/acts/ad-arriel-27-hp-turbine-module-m03-turbine-blade-displacement-cancelled/documents"}}