{"id":"F2006B07052","name":"AD/SM-205/30 Amdt 3 - Main Landing Gear Brace Assembly","slug":"ad-sm-205-30-amdt-3-main-landing-gear-brace-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48781,"registerId":"commonwealth-F2006B07052-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SM-205/30 Amdt 3 - Main Landing Gear Brace Assembly","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nSIAI Marchetti S205 and S208 Series Aeroplanes\n\nAD/SM-205/30\n\nAmdt 3\n\n  \nMain Landing Gear Brace Assembly 10/95\n\nApplicability: All models S205, 208 and 208A, fitted with any of the main gear brace assemblies referenced in the Requirement Document.\n\nRequirement: 1. Inspect in accordance with SIAI Marchetti Service Bulletin 205B48 F, and repair as necessary, in accordance with SIAI Marchetti Service Instruction 205IS26A\n\nNote: RAI AD 95-120 refers.\n\nCompliance: At the next inspection due in accordance with the previous issue of this Directive, thereafter in accordance with Requirement Document.\n\nThe previous issue of this Directive was dated August 1971 and compliance was based on component hours time in service.\n\nBackground: Cracks have been found in MLG Brace Assemblies modified to SB 205B36 which was terminating action for a previous inspection. Replacement braces of later P/N are also affected.\n\nAmendment 3 references the latest inspection document and the RAI AD, and introduces a repair scheme.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Yes. The amendment moves from an earlier component-hours time-in-service inspection regime to inspections governed by the latest Service Bulletin/Requirement Document, explicitly adds a repair procedure, and expands affected parts to include later replacement brace P/Ns (also cross-references the RAI AD)."},"complexity_factors":["Relies on external technical documents (Service Bulletin 205B48 F and Service Instruction 205IS26A) rather than containing full procedures in the Directive.","Introduces a repair scheme that shifts decision and work to maintenance organisations (technical judgement and parts/skills required).","Transitional compliance timing: \"next inspection due in accordance with the previous issue\" then follow Requirement Document — creates scheduling interpretation needs for operators.","Scope broadened to include replacement braces of later part numbers and references to a related RAI AD, requiring parts history and tracking.","Enforcement and verification depend on maintenance records and inspections, increasing administrative compliance burden."],"plain_english_summary":"This Airworthiness Directive orders operators of SIAI Marchetti S205, 208 and 208A aeroplanes fitted with the listed main landing gear brace assemblies to inspect those braces using SIAI Marchetti Service Bulletin 205B48 F and to repair any defects per Service Instruction 205IS26A. Compliance is required at the next scheduled inspection and thereafter as set out in the Requirement Document. CASA issued the amendment after cracks were found, including in replacement braces modified under an earlier service bulletin, so operators and maintenance organisations will bear inspection and repair costs."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The original 1971 directive appears to have been a simple recurring inspection based on component flight hours. Over three amendments, the scope has expanded to: (1) address newly discovered cracking in 'fixed' components that were supposed to be terminating action, (2) incorporate by reference an Italian aviation authority directive, (3) shift from hours-based to document-based compliance, and (4) add formal repair instructions. The directive has evolved from a routine inspection to a more comprehensive safety management program."},"complexity_factors":["Single, specific mechanical component addressed (main landing gear brace assembly)","Only 3 aircraft models affected with clear applicability statement","Simple two-step requirement: inspect per Service Bulletin, repair per Service Instruction","No nested exceptions or conditional logic — compliance timing is straightforward","Minimal cross-references (only one external document reference: RAI AD 95-120)","Short document length (approximately 150 words)","Only one defined term implied ('Requirement Document' refers to the referenced Service Bulletin)"],"plain_english_summary":"Owners and operators of SIAI Marchetti S205, S208 and 208A aircraft must inspect the main landing gear brace assembly for cracks and carry out required repairs per the manufacturer. This CASA Airworthiness Directive is mandatory for operators and maintenance organisations servicing those models.\n\nIt responds to cracked braces found despite prior fixes, so it tightens safety controls: updates the inspection method (away from component hours), references Italian guidance, and introduces a formal repair scheme."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sm-205-30-amdt-3-main-landing-gear-brace-assembly","history":"/api/acts/ad-sm-205-30-amdt-3-main-landing-gear-brace-assembly/history","analysis":"/api/acts/ad-sm-205-30-amdt-3-main-landing-gear-brace-assembly/analysis","conflicts":"/api/acts/ad-sm-205-30-amdt-3-main-landing-gear-brace-assembly/conflicts","importantCases":"/api/acts/ad-sm-205-30-amdt-3-main-landing-gear-brace-assembly/important-cases","documents":"/api/acts/ad-sm-205-30-amdt-3-main-landing-gear-brace-assembly/documents"}}