{"id":"F2006B02607","name":"AD/B-2/6 - Overunning Clutch - Modification and Cockpit Placard Amendment","slug":"ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41910,"registerId":"commonwealth-F2006B02607-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B-2/6 - Overunning Clutch - Modification and Cockpit Placard Amendment","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Brantly B-2 Series Helicopters\n\n \n\nAD/B-2/6 Overunning Clutch - Modification and Cockpit Placard Amendment\n\n\n12/60\n\n \n\nApplicability: All model B-2. Document: Brantly SL No. 1. Compliance:  Forthwith.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1540},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted maintenance directive addressing a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short text (only 3 substantive lines of requirements)","No defined terms or interpretation sections","Single unqualified compliance obligation ('Forthwith')","References external technical document (Brantly SL No. 1) without reproducing contents, requiring cross-referencing"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires all Brantly B‑2 owners/operators in Australia to get the helicopter’s overrunning clutch modified per Brantly Service Letter No. 1 and update the cockpit placard forthwith. It corrects a known clutch defect that can prevent autorotation after engine failure, reducing a significant crash risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment","history":"/api/acts/ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment/history","analysis":"/api/acts/ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment/analysis","conflicts":"/api/acts/ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment/conflicts","importantCases":"/api/acts/ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment/important-cases","documents":"/api/acts/ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment/documents"}}