{"id":"F2006B07063","name":"AD/SM-205/5 - Nose Gear Brace Cross Member - Replacement","slug":"ad-sm-205-5-nose-gear-brace-cross-member-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48805,"registerId":"commonwealth-F2006B07063-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SM-205/5 - Nose Gear Brace Cross Member - 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-205/5 Nose Gear Brace Cross Member - Replacement 3/71\n\nApplicability: All S205 series with S/Nos. 101 to 377, 386 and 387 except S/No. 102, 211, 235 and\n\n362.\n\n \n\nDocument:  SIAI Marchetti SB 205B14A. Compliance: 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","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused on one specific mechanical defect in one aircraft type. It has not expanded beyond its original purpose of mandating replacement of a specific faulty component."},"complexity_factors":["Extremely short document (approximately 100 words of substantive content)","Only 4 defined elements: applicability by serial number, document reference, compliance date, and aircraft model","No cross-references to other legislation or regulations beyond the enabling authority (Civil Aviation Regulations 1998, Part 39)","Single, unambiguous mandatory action with clear deadline","No conditional logic, exceptions to exceptions, or nested provisions","Straightforward applicability clause using simple serial number ranges and explicit exclusions"],"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) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of specific SIAI Marchetti aircraft to **replace a faulty part** — the \"nose gear brace cross member\" (a structural component in the front landing gear) — before a deadline of **31 March 1971**.\n\n**Who it affects:** \n- **Aircraft models:** SIAI Marchetti S205 and S208 series aeroplanes (small Italian-made aircraft)\n- **Specific serial numbers:** All S205 series with serial numbers 101 to 377, plus 386 and 387, **except** serial numbers 102, 211, 235, and 362\n\n**Why it matters:** Airworthiness Directives are legally binding safety instructions. If you own or operate one of these aircraft, you **must** comply or the aircraft cannot legally fly. This particular AD addresses a structural defect in the nose landing gear that could affect flight safety.\n\n**Key details:**\n- **Compliance deadline:** Before 31 March 1971 (note: this is a historical directive from 1971)\n- **Technical reference:** SIAI Marchetti Service Bulletin 205B14A (the manufacturer's official repair instructions)"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The source text sets a single, specific requirement (replacement of the nose gear brace cross member) for identified S205 serial numbers, references a single manufacturer service bulletin for implementation, and specifies a compliance deadline. The AD text contains no indication that the scope has been altered from any earlier version; therefore there is no evidence in the provided document that the scope has changed from an earlier/original intent."},"complexity_factors":["Clear single mandatory action (replacement) reduces complexity","Applicability limited to a specific aircraft model and defined serial-number ranges, with four explicit exclusions [Applicability]","Reliance on an external manufacturer service bulletin (SIAI Marchetti SB 205B14A) for the method of replacement introduces dependence on another document [Document]","Fixed compliance date imposes a time-constrained operational and logistical requirement (parts, labour, downtime) [Compliance]","No additional procedural or certification detail in the AD text (e.g., no alternative methods of compliance stated), which concentrates interpretation on the referenced service bulletin [Document; Compliance]"],"plain_english_summary":"This directive mandates replacement of the nose-gear brace cross member on specified SIAI Marchetti S205 series aeroplanes (serials 101–377 and 386–387, excluding 102, 211, 235 and 362) by 31 March 1971, performed per the manufacturer’s service bulletin. Aircraft owners/operators must arrange and fund the work, which will cause maintenance downtime and requires access to the referenced parts and procedures."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sm-205-5-nose-gear-brace-cross-member-replacement","history":"/api/acts/ad-sm-205-5-nose-gear-brace-cross-member-replacement/history","analysis":"/api/acts/ad-sm-205-5-nose-gear-brace-cross-member-replacement/analysis","conflicts":"/api/acts/ad-sm-205-5-nose-gear-brace-cross-member-replacement/conflicts","importantCases":"/api/acts/ad-sm-205-5-nose-gear-brace-cross-member-replacement/important-cases","documents":"/api/acts/ad-sm-205-5-nose-gear-brace-cross-member-replacement/documents"}}