{"id":"F2006B07042","name":"AD/SM-205/2 - Main Landing Gear - Inspection","slug":"ad-sm-205-2-main-landing-gear-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48760,"registerId":"commonwealth-F2006B07042-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SM-205/2 - Main Landing Gear - Inspection","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-205/2 Main Landing Gear - Inspection 2/71\n\nApplicability: Models S205-18/F, -18/R, -20/F, -20/R, -22/R and all S208 series. Document:  SIAI Marchetti SB 205B27.\n\nCompliance: Visual inspection: Before first flight after 17 December 1970 and thereafter at intervals not exceeding 50 hours time in service. Penetrant inspection:              Within 50 hours time in service after 17 December 1970 and thereafter at intervals not exceeding 300 hours time in service.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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 Airworthiness Directive maintains its original narrow scope. It was issued to address a specific safety concern with main landing gear on specific SIAI Marchetti aircraft models, and the text shows no expansion into broader operational requirements, additional aircraft types, or unrelated maintenance areas. The directive remains tightly focused on the original inspection mandate issued in 1970."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 2 defined terms implied ('time in service' and 'penetrant inspection' — though not explicitly defined in this excerpt, they are standard aviation terms)","No cross-references to other legislation sections within the directive itself","Simple conditional structure: applicability list + two compliance requirements with clear time triggers","Single purpose: inspection mandate with no exceptions, exemptions, or nested conditions","Straightforward applicability criteria (specific aircraft models only)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific Italian-made aircraft (SIAI Marchetti S205 and S208 series planes) to inspect the main landing gear on a strict schedule to prevent failures that could cause accidents.\n\n**Who must comply:** Anyone operating these specific aircraft models: S205-18/F, S205-18/R, S205-20/F, S205-20/R, S205-22/R, and all S208 series aircraft.\n\n**What must be done:** Two types of inspections are required:\n- **Visual inspection:** Must be done before the first flight after 17 December 1970, then repeated every 50 hours of flight time (\"time in service\" means actual flying hours, not just engine running time).\n- **Penetrant inspection:** A more detailed check using special dye to detect cracks, required within 50 flight hours after 17 December 1970, then repeated every 300 flight hours.\n\n**Why it matters:** Landing gear failures can be catastrophic. This directive was issued following technical guidance from the manufacturer (Service Bulletin 205B27), suggesting potential defects were discovered that needed mandatory monitoring. The dates indicate this is historical aviation safety legislation from 1970, but if these aircraft are still flying, the directive remains binding."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The supplied text defines inspections for the listed aircraft models and prescribes fixed inspection intervals. The excerpt contains no language indicating an expansion or reduction of scope relative to an earlier version; it simply specifies applicability and compliance requirements (Applicability; Compliance; Document)."},"complexity_factors":["Narrow applicability list (specific S205 and S208 submodels) limits scope but requires model checks (Applicability).","Two distinct inspection types with different timing rules (visual: <=50 hours; penetrant: <=300 hours) require separate scheduling and record-keeping (Compliance).","Effective/trigger date language references 17 December 1970, a legacy date that may require interpretation in fleet records (Compliance).","Reliance on an external manufacturer service bulletin (SIAI Marchetti SB 205B27) for procedural detail increases compliance steps and dependence on an outside document (Document).","The supplied text does not include exemption, alternative compliance, or enforcement language, leaving potentially unresolved implementation questions (Applicability; Compliance)."],"plain_english_summary":"This AD requires recurring visual and penetrant inspections of the main landing gear on specified SIAI Marchetti S205 and all S208‑series aircraft, and directs operators to SIAI Marchetti SB 205B27 for procedural detail. Owners and operators of the listed aircraft must comply.\n\nVisual inspections are every 50 flight hours; penetrant inspections initially within 50 hours and thereafter every 300 hours. Operators must schedule and fund the checks, obtain the referenced bulletin, and accept recurring maintenance costs, aircraft downtime and increased demand on maintenance providers."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sm-205-2-main-landing-gear-inspection","history":"/api/acts/ad-sm-205-2-main-landing-gear-inspection/history","analysis":"/api/acts/ad-sm-205-2-main-landing-gear-inspection/analysis","conflicts":"/api/acts/ad-sm-205-2-main-landing-gear-inspection/conflicts","importantCases":"/api/acts/ad-sm-205-2-main-landing-gear-inspection/important-cases","documents":"/api/acts/ad-sm-205-2-main-landing-gear-inspection/documents"}}