{"id":"F2009L02755","name":"AD/ECUREUIL/20 - Main Gear Box Oil Filter - Inspection - CANCELLED","slug":"ad-ecureuil-20-main-gear-box-oil-filter-inspection-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":79888,"registerId":"commonwealth-F2009L02755-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter AS 350 (Ecureuil) Series Heli","sectionType":"division","heading":"Eurocopter AS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/20 | Main Gear Box Oil Filter - Inspection | 8/2009 |\n| -------------- | ------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                   |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n|              | This AD is cancelled on 30 July 2009.                                                                                                                                                                                                                        |\n| Background:  | This unique Australian AD specified an inspection in accordance with Aerospatiale SB No. 05.12 at 100 hour intervals. The periodic inspections could be terminated when the helicopter was modified. The AD was published in 1983 and 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/ECUREUIL/20","sectionType":"part","heading":"AD/ECUREUIL/20","content":"## AD/ECUREUIL/20","sortOrder":1},{"sectionNumber":"Main Gear Box Oil Filter - Inspection","sectionType":"part","heading":"Main Gear Box Oil Filter - Inspection","content":"## Main Gear Box Oil Filter - Inspection","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":2266},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"This instrument completely cancels the original Airworthiness Directive, shifting from imposing mandatory safety inspections (the original intent since 1983) to eliminating those requirements. The scope has contracted from active regulation to revocation."},"complexity_factors":["Single operative provision (cancellation of prior instrument)","No interpretation section or defined terms","No conditional, cross-referencing, or cascading provisions","Document length is minimal (approximately 100 words of operative content)","No exceptions or exemptions to navigate"],"plain_english_summary":"This document **cancels** a former aviation safety rule that required regular helicopter inspections.\n\n**What it affects:**\nEurocopter AS 350 (Ecureuil) series helicopters.\n\n**What it does:**\n* Revokes Airworthiness Directive AD/ECUREUIL/20, which since 1983 mandated inspections of the main gearbox oil filter every 100 flight hours\n* Removes the mandatory inspection requirement entirely\n* Takes effect on 30 July 2009\n\n**Why it matters:**\nOwners and operators no longer need to perform the specific 100-hour oil filter inspections required by the original 1983 directive. The rule is no longer necessary because the helicopters have been modified or the safety issue has otherwise been resolved."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ecureuil-20-main-gear-box-oil-filter-inspection-cancelled","history":"/api/acts/ad-ecureuil-20-main-gear-box-oil-filter-inspection-cancelled/history","analysis":"/api/acts/ad-ecureuil-20-main-gear-box-oil-filter-inspection-cancelled/analysis","conflicts":"/api/acts/ad-ecureuil-20-main-gear-box-oil-filter-inspection-cancelled/conflicts","importantCases":"/api/acts/ad-ecureuil-20-main-gear-box-oil-filter-inspection-cancelled/important-cases","documents":"/api/acts/ad-ecureuil-20-main-gear-box-oil-filter-inspection-cancelled/documents"}}