{"id":"F2006B07065","name":"AD/SM-205/7 - Right Main Landing Gear Control Rod - Replacement","slug":"ad-sm-205-7-right-main-landing-gear-control-rod-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48810,"registerId":"commonwealth-F2006B07065-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SM-205/7 - Right Main Landing Gear Control Rod - Replacement","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-205/7 Right Main Landing Gear Control Rod - Replacement\n\nApplicability: Models S205-18/R, S205-20/R and S205-22/R with S/Nos. 106 to 238. Document:  SIAI Marchetti SB 205B11.\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\n3/71\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive from 1971 with a single specific purpose. There is no indication of scope creep; it addresses exactly one mechanical defect in specific aircraft."},"complexity_factors":["Extremely short document (approximately 100 words)","No defined terms section","No cross-references to other legislation beyond basic regulation citation","Simple conditional logic: single applicability test (specific models and serial numbers)","Single compliance action with absolute deadline","No exceptions, exemptions, or nested conditions","Straightforward technical reference to manufacturer service bulletin"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations.\n\n**What it does:**\nOrders owners and operators of specific SIAI Marchetti aircraft models to **replace the right main landing gear control rod**.\n\n**Who it affects:**\n- **Aircraft models:** S205-18/R, S205-20/R, and S205-22/R\n- **Serial numbers:** 106 to 238 only\n- **Reference document:** SIAI Marchetti Service Bulletin 205B11 (the manufacturer's official repair notice)\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety instructions. If you own or operate one of these specific aircraft, you **must** replace this part by the deadline to keep the aircraft legally airworthy. Flying without complying could ground your aircraft or create serious safety risks with the landing gear.\n\n**Key deadline:**\nCompliance required **before 31 March 1971**."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument sets a single mandatory action for a clearly defined subset of aircraft and a fixed compliance date. The AD text does not indicate any change to its own scope from an earlier or different intent; it narrowly prescribes replacement for the listed models and serial numbers and refers to a service bulletin for technical execution. (Applicability; Compliance; Document: SIAI Marchetti SB 205B11)"},"complexity_factors":["Narrow, specific applicability (three model variants and a single serial-number range). (Applicability)","Single, discrete required action (replace one component). (Title; Compliance)","Fixed compliance deadline with no alternatives or staged options in the text. (Compliance)","References an external service bulletin for technical detail rather than embedding procedures, which reduces procedural complexity but creates dependency on that document. (Document: SIAI Marchetti SB 205B11)","No certification, exemption, or appeal procedures included in the instrument itself.","No finance, reporting, or ongoing monitoring requirements specified."],"plain_english_summary":"# What this instrument does\n\nThis airworthiness directive (AD) orders operators/owners to replace the right main landing gear control rod on certain SIAI Marchetti S205 series aeroplanes. It applies to Models S205-18/R, S205-20/R and S205-22/R with serial numbers 106 to 238. The replacement must be carried out in accordance with SIAI Marchetti Service Bulletin SB 205B11 and completed before 31 March 1971. (See: Applicability; Compliance; Document: SIAI Marchetti SB 205B11.)\n\n# Who it affects\n\n- Aircraft owners and operators of the specified S205 models with S/Nos. 106–238. (Applicability.)\n- Organisations or individuals that supply the replacement parts and perform the work (maintenance providers) because they will carry out the physical replacement under the service bulletin. (Document reference: SIAI Marchetti SB 205B11.)\n\n# Why it matters (what the instrument claims and practical implications)\n\n- The AD requires a specific physical intervention (replacement of a control rod) by a fixed date. Mechanically, it changes the condition of affected aircraft by mandating replacement of a component. (Applicability; Compliance.)\n- The AD’s title and mandated replacement indicate the measure is intended to address an airworthiness/safety concern related to the right main landing gear control rod. The text of the AD itself does not describe the underlying defect, failure mode, or incident history; it only prescribes the action and deadline. (Title; Applicability; Compliance.)\n\n# Who pays and who decides\n\n- Owners/operators must arrange and pay for the replacement work and any parts required, unless they have other contractual arrangements. The AD sets the requirement and the deadline; it does not specify funding or compensation. (Applicability; Compliance; Document: SIAI Marchetti SB 205B11.)\n- The Civil Aviation Safety Authority (via the Part 39 Schedule of Airworthiness Directives) is the issuing authority for the AD, which makes the requirement mandatory under the cited regulatory framework. (Header: Civil Aviation Regulations 1998, PART 39.)\n\n# Compliance burden and implementation risk\n\n- Compliance requires obtaining the replacement part(s) and performing the mechanical work according to the referenced service bulletin. The AD does not detail labour hours, parts availability, or who is authorised to perform the work; those practical matters follow from the service bulletin and normal maintenance rules. (Document: SIAI Marchetti SB 205B11.)\n- The AD fixes a compliance date (before 31 March 1971). A fixed deadline creates a risk that aircraft might be grounded or restricted from operation until the replacement is fitted if work is not completed in time. The AD does not provide alternatives, phased compliance, or exemptions within its text. (Compliance.)\n\n# Effects on markets and private choices\n\n- Maintenance providers gain a defined opportunity to supply parts and labour to affected operators. The AD narrows the market for those services to the specified models and serial numbers. (Applicability; Document.)\n- Operators face a short-term cost (parts, labour, aircraft downtime) and an operational choice: perform the mandated replacement by the date or face regulatory non-compliance. The AD does not address cost recovery, insurance, or contractual arrangements between owners and maintenance providers. (Applicability; Compliance; Document.)\n\n# Trade-offs, incentives and administrative discretion\n\n- The AD creates a mandatory safety-improvement incentive for owners/operators. The directive itself leaves no discretion about whether to act: it prescribes replacement and a deadline. (Applicability; Compliance.)\n- Administrative discretion in this instrument is limited: the AD specifies the action, the affected fleet slice, the service bulletin to follow, and the compliance date. It does not set out an approval process for deviations or a mechanism for waivers within the text provided. (Applicability; Compliance; Document.)\n\n# Bottom line\n\nThis AD is a targeted, mandatory safety requirement: replace the right main landing gear control rod on specified SIAI Marchetti S205 variants with serial numbers 106–238 in accordance with SIAI Marchetti SB 205B11 before 31 March 1971. Owners/operators bear the cost and operational impact; the AD itself contains the prescribed action, the affected fleet, and the compliance deadline but does not set out background facts, costs, or exemption procedures in the text provided. (Applicability; Compliance; Document: SIAI Marchetti SB 205B11.)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-sm-205-7-right-main-landing-gear-control-rod-replacement","history":"/api/acts/ad-sm-205-7-right-main-landing-gear-control-rod-replacement/history","analysis":"/api/acts/ad-sm-205-7-right-main-landing-gear-control-rod-replacement/analysis","conflicts":"/api/acts/ad-sm-205-7-right-main-landing-gear-control-rod-replacement/conflicts","importantCases":"/api/acts/ad-sm-205-7-right-main-landing-gear-control-rod-replacement/important-cases","documents":"/api/acts/ad-sm-205-7-right-main-landing-gear-control-rod-replacement/documents"}}