{"id":"F2009L02779","name":"AD/AS 355/35 - AC Generation System - CANCELLED","slug":"ad-as-355-35-ac-generation-system-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":79952,"registerId":"commonwealth-F2009L02779-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter AS 355 (Twin Ecureuil) Series","sectionType":"division","heading":"Eurocopter AS 355 (Twin Ecureuil) Series Helicopters","content":"### Eurocopter AS 355 (Twin Ecureuil) Series Helicopters\n\n| AD/AS 355/35 | AC Generation System | 8/2009 |\n| ------------ | -------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                        |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 30 July 2009.                                                                                                                             |\n| Background:  | This unique Australian AD specified a check of the AC electrical generation system within 100 hours time in service after May 1990. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n16 June 2009","sortOrder":0},{"sectionNumber":"AD/AS 355/35","sectionType":"part","heading":"AD/AS 355/35","content":"## AD/AS 355/35","sortOrder":1},{"sectionNumber":"AC Generation System","sectionType":"part","heading":"AC Generation System","content":"## AC Generation System","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":1230},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument simply cancels a previous Airworthiness Directive. It does not expand regulatory scope; it terminates an existing requirement entirely."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic or exceptions","No cross-references to other legislation","Extremely short (under 200 words of substance)"],"plain_english_summary":"This document cancels a previous aviation safety rule (**Airworthiness Directive**) that applied to **Eurocopter AS 355 (Twin Ecureuil) helicopters**.\n\n**What it used to require:**\nThe previous rule (from May 1990) required operators to check the helicopter's **AC electrical generation system** within 100 hours of flying time.\n\n**What this does:**\nAs of **30 July 2009**, that check is no longer required. The Civil Aviation Safety Authority (CASA) has cancelled the directive because the safety issue has been resolved or is no longer relevant.\n\n**Who is affected:**\nOwners and operators of Eurocopter AS 355 helicopters (and maintenance organisations working on them) no longer need to comply with the specific check mandated by the original 1990 directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-as-355-35-ac-generation-system-cancelled","history":"/api/acts/ad-as-355-35-ac-generation-system-cancelled/history","analysis":"/api/acts/ad-as-355-35-ac-generation-system-cancelled/analysis","conflicts":"/api/acts/ad-as-355-35-ac-generation-system-cancelled/conflicts","importantCases":"/api/acts/ad-as-355-35-ac-generation-system-cancelled/important-cases","documents":"/api/acts/ad-as-355-35-ac-generation-system-cancelled/documents"}}