{"id":"F2006B04747","name":"AD/BN-2/35 Amdt 2 - Airframe Structural Fatigue Life Limitations","slug":"ad-bn-2-35-amdt-2-airframe-structural-fatigue-life-limitations","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44511,"registerId":"commonwealth-F2006B04747-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BN-2/35 Amdt 2 - Airframe Structural Fatigue Life Limitations","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)  Pilatus Britten-Norman BN-2 Series Aeroplanes\n\n \n\nAD/BN-2/35\n\nAmdt 2\n\n\nAirframe Structural Fatigue Life Limitations 5/93\n\n \n\nApplicability: All models.\n\n \n\nRequirement: Retire from service the wing and wing attachment fuselage frames. Compliance: Before 28,000 hours in service.\n\nBackground: This amendment extends the interim fatigue life for the Islander series, based on a comparison with the results of the Trislander fatigue test. The manufacturer’s fatigue review of the Islander is not yet complete.\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":2180},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This second amendment (Amdt 2) modifies the specific hour threshold but maintains the original scope of imposing structural fatigue life limits on BN-2 Islander aircraft. The instrument has not expanded to cover additional aircraft types, components, or operational requirements beyond the original airworthiness safety mandate."},"complexity_factors":["Single, unconditional requirement with no exceptions or nested conditional logic","No defined terms or interpretation clauses requiring legal analysis","No cross-references to other legislative instruments in the provided text","Extremely brief (under 150 words of operative provisions)","Minor complexity arising from aviation-specific terminology (fuselage frames, fatigue life)"],"plain_english_summary":"This Airworthiness Directive requires owners and operators of Pilatus Britten‑Norman BN‑2 Islander aircraft to permanently retire the wings and fuselage frames before the airframe reaches 28,000 total flight hours to prevent metal‑fatigue failure. It applies to all BN‑2 models, extends a prior deadline based on related Trislander testing, and is an interim measure pending a full manufacturer fatigue review."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-35-amdt-2-airframe-structural-fatigue-life-limitations","history":"/api/acts/ad-bn-2-35-amdt-2-airframe-structural-fatigue-life-limitations/history","analysis":"/api/acts/ad-bn-2-35-amdt-2-airframe-structural-fatigue-life-limitations/analysis","conflicts":"/api/acts/ad-bn-2-35-amdt-2-airframe-structural-fatigue-life-limitations/conflicts","importantCases":"/api/acts/ad-bn-2-35-amdt-2-airframe-structural-fatigue-life-limitations/important-cases","documents":"/api/acts/ad-bn-2-35-amdt-2-airframe-structural-fatigue-life-limitations/documents"}}