{"id":"F2006B07032","name":"AD/SM-205/10 - Aileron Control Cable Guard - Installation","slug":"ad-sm-205-10-aileron-control-cable-guard-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48733,"registerId":"commonwealth-F2006B07032-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SM-205/10 - Aileron Control Cable Guard - Installation","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)  SIAI Marchetti S205 and S208 Series Aeroplanes\n\n \n\nAD/SM-205/10 Aileron Control Cable Guard - Installation 3/71\n\nApplicability: All S205 series with S/Nos. prior to 4-103. Document:  SIAI Marchetti SB 205B17.\n\nCompliance: Before 31 March 1971.\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\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive’s scope as presented is limited to S205 series aircraft with serial numbers prior to 4-103, requires installation of an aileron control cable guard per SIAI Marchetti SB 205B17, and sets a single compliance date (Applicability; Document; Compliance). There is no indication in the supplied text that the scope has been amended or expanded from that original specification."},"complexity_factors":["Narrow, serial-number-based applicability (Applicability: \"All S205 series with S/Nos. prior to 4-103\").","Fixed, short compliance deadline (Compliance: \"Before 31 March 1971\").","Technical implementation delegated to an external service bulletin rather than contained in the AD (Document: \"SIAI Marchetti SB 205B17\").","Very short text with limited statutory detail to interpret (AD title, applicability, document reference, and compliance date only).","No alternative compliance paths or enforcement details stated in the AD text provided."],"plain_english_summary":"This AD mandates installation of an aileron control cable guard on SIAI Marchetti S205 series aeroplanes with serial numbers prior to 4‑103, using SIAI Marchetti Service Bulletin SB 205B17. Compliance is mandatory before 31 March 1971; the aircraft owner/operator is responsible for arranging and funding the retrofit."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive focused specifically on aileron control cable protection for one aircraft type. It has not expanded beyond its original narrow technical scope."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 2 defined applicability criteria (aircraft model and serial number range)","Single, unambiguous compliance action (install cable guard)","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","No conditional logic, exceptions, or nested provisions","Clear, fixed compliance date with no alternative methods or extensions mentioned"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires aircraft owners to fix a specific safety problem.\n\n**What it does:** It orders owners of certain **SIAI Marchetti S205 series aeroplanes** (specifically those with serial numbers before 4-103) to install a guard to protect the **aileron control cables**. Ailerons are the hinged parts on the wings that make the plane roll left or right; the control cables are the wires that connect the pilot's control wheel to those wing surfaces. The guard prevents these cables from chafing (wearing through) or being damaged, which could cause the pilot to lose control of the aircraft.\n\n**Who it affects:** Owners and operators of older SIAI Marchetti S205 series aircraft with serial numbers below 4-103.\n\n**Why it matters:** Damaged control cables can lead to partial or complete loss of roll control — a potentially catastrophic failure. This directive mandates a physical fix (installing a protective guard) based on a manufacturer's service bulletin (SB 205B17).\n\n**Compliance deadline:** The work had to be completed before 31 March 1971.\n\n**Key terms:**\n- **Airworthiness Directive (AD):** A legally enforceable safety order; compliance is mandatory.\n- **Service Bulletin (SB):** Technical instructions issued by the aircraft manufacturer detailing required maintenance or modifications.\n- **Aileron:** The movable surface on a wing that controls the aircraft's roll."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sm-205-10-aileron-control-cable-guard-installation","history":"/api/acts/ad-sm-205-10-aileron-control-cable-guard-installation/history","analysis":"/api/acts/ad-sm-205-10-aileron-control-cable-guard-installation/analysis","conflicts":"/api/acts/ad-sm-205-10-aileron-control-cable-guard-installation/conflicts","importantCases":"/api/acts/ad-sm-205-10-aileron-control-cable-guard-installation/important-cases","documents":"/api/acts/ad-sm-205-10-aileron-control-cable-guard-installation/documents"}}