{"id":"F2006B04444","name":"AD/BELL 206/13 - Fan Shaft Assembly - Inspection","slug":"ad-bell-206-13-fan-shaft-assembly-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44281,"registerId":"commonwealth-F2006B04444-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/13 - Fan Shaft Assembly - Inspection","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)  Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\n \n\nAD/BELL 206/13 Fan Shaft Assembly - Inspection 5/69\n\nApplicability: All model 206A and AB-206A. Document:  Bell SB No. 206A-9.\n\nNote: Agusta SB No. BT206-30 Refers.\n\n \n\nCompliance: 1. Initially inspect within 25 hours time in service after 23 April 1969 for helicopters with 300 hours or less total time in service; and Serial Numbers listed in Bell SB No. 206A-9.\n\n \n\n2. Whenever fan drive shaft bearing hangars are removed and reinstalled or replaced. Background:              AD/Agusta 206/14 equivalent.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1601},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original targeted scope—a specific inspection requirement for fan shaft assemblies on defined helicopter models. No evidence of expansion into unrelated systems or aircraft types."},"complexity_factors":["Short, single-issue directive with narrow applicability","Dual compliance triggers (calendar/flight-hours and maintenance events)","Reliance on external technical documents (Service Bulletins) for actual procedures","Conditional applicability requiring verification of aircraft serial numbers and accumulated flight hours"],"plain_english_summary":"This CASA airworthiness directive mandates inspections of the fan shaft assembly on certain Bell and Agusta‑Bell Model 206A/AB‑206A helicopters (serials listed in Bell Service Bulletin 206A‑9).  \n\nOperators must carry out the required initial checks per the AD’s timeframe and repeat inspections whenever fan drive shaft bearing hangers are removed or replaced, to prevent cooling‑system failures that could cause engine overheating or catastrophic damage."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-13-fan-shaft-assembly-inspection","history":"/api/acts/ad-bell-206-13-fan-shaft-assembly-inspection/history","analysis":"/api/acts/ad-bell-206-13-fan-shaft-assembly-inspection/analysis","conflicts":"/api/acts/ad-bell-206-13-fan-shaft-assembly-inspection/conflicts","importantCases":"/api/acts/ad-bell-206-13-fan-shaft-assembly-inspection/important-cases","documents":"/api/acts/ad-bell-206-13-fan-shaft-assembly-inspection/documents"}}