{"id":"F2006B11086","name":"AD/LANCAIR/3 - Fibre Composite Primary Structure","slug":"ad-lancair-3-fibre-composite-primary-structure","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56745,"registerId":"commonwealth-F2006B11086-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/LANCAIR/3 - Fibre Composite Primary Structure","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)  Lancair Series Aeroplanes\n\n \n\nAD/LANCAIR/3 Fibre Composite Primary Structure 2/98\n\nCANCELLED.\n\n \n\nBackground: The Authority became aware of deficiencies in the kit manufacturer's system of quality control. As a result, the material properties used in the LANCAIR kits became suspect. AD/LANCAIR/3 was raised to restrict the flight envelope of the aircraft pending an investigation into the effect of these changes. The results of the investigation showed that the material is presently suitable for the current aircraft certification standard. Concerns with potential aging properties of the material will be separately addressed.\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":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a cancellation of a specific Airworthiness Directive. The scope has narrowed to zero as the directive no longer has any operative effect. This is the intended lifecycle of an AD that has been superseded or resolved."},"complexity_factors":["Document is a cancellation notice, not operative legislation","No defined terms section","No conditional logic or cross-references","Extremely short (under 200 words)","Single operative word: \"CANCELLED\"","Background section is narrative/explanatory only"],"plain_english_summary":"This is a **cancelled Airworthiness Directive** (AD) that once applied to **Lancair series aeroplanes** (home-built kit aircraft). \n\n**What it did:**\n- Originally restricted how these planes could fly (limited their \"flight envelope\") because the aviation safety regulator discovered problems with the kit manufacturer's quality control system.\n- The concern was that the **fibre composite materials** (strong, lightweight materials like carbon fibre used in the aircraft's main structure) might not have the right strength properties due to manufacturing issues.\n\n**Why it was cancelled:**\n- After investigation, the material was found to be safe enough for the current certification standards.\n- The directive was cancelled, meaning the flight restrictions were lifted.\n- Note: Potential long-term aging issues with the material will be dealt with separately in future directives.\n\n**Who it affects:**\n- Owners and operators of Lancair kit-built aircraft in Australia.\n\n**Why it matters:**\n- This shows how aviation safety regulators respond to manufacturing defects. When they suspect materials might be unsafe, they issue restrictions immediately, then remove them once testing proves the aircraft are safe to fly."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Original scope: AD/LANCAIR/3 imposed a restriction on the flight envelope of Lancair series aeroplanes while the Authority investigated suspect material properties in the manufacturer's kits. (AD/LANCAIR/3; Background)\n\nChanged scope: following the investigation, the Authority concluded the material presently meets the applicable certification standard and CANCELLED AD/LANCAIR/3, removing the operational restriction. The Authority separately flagged future action on ageing properties, indicating the immediate restriction has been lifted but related issues remain subject to further work. (AD/LANCAIR/3; Background)"},"complexity_factors":["Technical subject-matter: material properties of fibre-composite primary structures require engineering assessment (Background).","Regulatory intervention sequence: temporary restriction (flight-envelope limitation), investigation, then cancellation — multiple procedural steps (AD/LANCAIR/3; Background).","Unresolved future work: separate follow-up on potential ageing properties introduces future technical and regulatory complexity (Background).","Unspecified remedial obligations: source identifies manufacturer quality-control deficiencies but does not specify remediation or cost allocation, leaving implementation details open (Background).","Stakeholder impact: affects kit manufacturer, aircraft owners/operators, and the regulator, with operational implications while the AD was active (AD/LANCAIR/3; Background)."],"plain_english_summary":"The Civil Aviation Safety Authority has cancelled AD/LANCAIR/3, which previously limited the flight envelope of Lancair series kit aeroplanes. That directive was issued after kit‑manufacturer quality‑control deficiencies made composite material properties suspect.\n\nFollowing investigation, the Authority found the material meets current certification standards and lifted the operational restriction. Remaining concerns about material ageing will be addressed separately and may prompt future action."}},"importantCases":[],"_links":{"self":"/api/acts/ad-lancair-3-fibre-composite-primary-structure","history":"/api/acts/ad-lancair-3-fibre-composite-primary-structure/history","analysis":"/api/acts/ad-lancair-3-fibre-composite-primary-structure/analysis","conflicts":"/api/acts/ad-lancair-3-fibre-composite-primary-structure/conflicts","importantCases":"/api/acts/ad-lancair-3-fibre-composite-primary-structure/important-cases","documents":"/api/acts/ad-lancair-3-fibre-composite-primary-structure/documents"}}