{"id":"F2006B06111","name":"AD/PC-6/1 - Rudder and Aileron Interconnection - Modification","slug":"ad-pc-6-1-rudder-and-aileron-interconnection-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46865,"registerId":"commonwealth-F2006B06111-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PC-6/1 - Rudder and Aileron Interconnection - Modification","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 Porter PC-6 Series Aeroplanes\n\n \n\nAD/PC-6/1 Rudder and Aileron Interconnection - Modification 2/66\n\nApplicability: All models. Document: Pilatus SB No. 21. Compliance: Before 15 March 1966.\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":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The supplied text shows a single mandatory modification requirement applying to all PC‑6 models, with no language indicating an expansion or narrowing of scope relative to the directive as presented. The AD does not include amendment history or transitional language that would indicate a change to scope within the excerpt provided."},"complexity_factors":["Single mandatory action with a single fixed deadline reduces legal complexity.","Broad applicability to all PC-6 models increases operational reach but does not add procedural complexity.","Reference to an external technical document (Pilatus SB No. 21) requires implementers to obtain and follow separate technical material.","Lack of technical detail in the AD itself requires reliance on maintenance specialists and the manufacturer’s bulletin for execution.","No alternative compliance pathways, exemptions, or staged implementation described in the AD excerpt."],"plain_english_summary":"This airworthiness directive mandates that all Pilatus Porter PC‑6 aeroplanes have the rudder–aileron interconnection modified in accordance with Pilatus Service Bulletin No. 21, with work required before 15 March 1966.  \n\nIt affects every PC‑6 owner/operator, who must obtain the service bulletin, carry out and pay for the modification, and comply by the regulator’s deadline."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a historical airworthiness directive from 1966 with a narrow, specific scope (single aircraft type, single modification). There is no evidence of scope creep; it remains precisely targeted at the original safety issue."},"complexity_factors":["Extremely short document (approximately 100 words of substantive content)","No defined terms section — uses plain aviation terminology","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Simple conditional structure: applicability statement + single compliance requirement","Single technical reference to external document (Pilatus SB No. 21)","No exceptions, exemptions, or nested conditions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nRequires owners and operators of **Pilatus Porter PC-6 series aeroplanes** (a type of single-engine turboprop aircraft often used for cargo, parachuting, or bush flying) to carry out a specific modification to the **rudder and aileron interconnection system**.\n\n**Who it affects:**\nAnyone who owns, operates, or maintains any model of the Pilatus PC-6 aircraft in Australia.\n\n**Why it matters:**\nThe rudder and aileron interconnection is a mechanical system that links the rudder (the vertical tail surface that steers the nose left/right) with the ailerons (the wing flaps that roll the aircraft). If this system isn't working correctly, pilots may lose coordinated control of the aircraft, potentially leading to dangerous flight conditions or loss of control. This directive mandates a fix before a specific deadline to prevent accidents.\n\n**Key details:**\n- **Compliance deadline:** Before 15 March 1966\n- **Technical reference:** Pilatus Service Bulletin No. 21 (the manufacturer's official instruction for the fix)\n- **Applies to:** All PC-6 models"}},"importantCases":[],"_links":{"self":"/api/acts/ad-pc-6-1-rudder-and-aileron-interconnection-modification","history":"/api/acts/ad-pc-6-1-rudder-and-aileron-interconnection-modification/history","analysis":"/api/acts/ad-pc-6-1-rudder-and-aileron-interconnection-modification/analysis","conflicts":"/api/acts/ad-pc-6-1-rudder-and-aileron-interconnection-modification/conflicts","importantCases":"/api/acts/ad-pc-6-1-rudder-and-aileron-interconnection-modification/important-cases","documents":"/api/acts/ad-pc-6-1-rudder-and-aileron-interconnection-modification/documents"}}