{"id":"F2006B02582","name":"AD/B-2/11 - Tail Rotor Blade Retaining Nut - Safetying","slug":"ad-b-2-11-tail-rotor-blade-retaining-nut-safetying","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41838,"registerId":"commonwealth-F2006B02582-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B-2/11 - Tail Rotor Blade Retaining Nut - Safetying","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-2/11 Tail Rotor Blade Retaining Nut - Safetying 12/60\n\nApplicability: All model B-2. Document: Brantly SL No. 12. 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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1335},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope addressing a specific mechanical safety defect in tail rotor blade retention for a particular helicopter model."},"complexity_factors":["Extremely brief operative text (less than 30 words)","No definitions or interpretation provisions","Single unconditional compliance requirement with no exceptions","Only one external reference (manufacturer service letter)"],"plain_english_summary":"**What it does:** This directive mandates immediate safety action on all Brantly B-2 model helicopters to secure the tail rotor blade retaining nuts.\n\n**Who it affects:** Owners, operators, and maintainers of Brantly B-2 series helicopters.\n\n**What you must do:** Immediately comply with the instructions in Brantly Service Letter No. 12 regarding the \"safetying\" (locking or wiring) of tail rotor blade retaining nuts.\n\n**Why it matters:** If these nuts loosen in flight, the tail rotor blades could detach, causing catastrophic loss of directional control and potentially fatal accidents. The requirement takes effect immediately (\"forthwith\")."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b-2-11-tail-rotor-blade-retaining-nut-safetying","history":"/api/acts/ad-b-2-11-tail-rotor-blade-retaining-nut-safetying/history","analysis":"/api/acts/ad-b-2-11-tail-rotor-blade-retaining-nut-safetying/analysis","conflicts":"/api/acts/ad-b-2-11-tail-rotor-blade-retaining-nut-safetying/conflicts","importantCases":"/api/acts/ad-b-2-11-tail-rotor-blade-retaining-nut-safetying/important-cases","documents":"/api/acts/ad-b-2-11-tail-rotor-blade-retaining-nut-safetying/documents"}}