{"id":"F2006B02216","name":"AD/AC-SNOW/3 - Main Landing Gear Axle - Inspection and Modification","slug":"ad-ac-snow-3-main-landing-gear-axle-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41446,"registerId":"commonwealth-F2006B02216-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC-SNOW/3 - Main Landing Gear Axle - Inspection and Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 8/1966,Aircraft below 5700 kg,Ayres Thrush (Snow) Commander Series Aeroplanes,Main Landing Gear Axle - Inspection and Modification,3\ntitle: Airworthiness Directive - AD/AC-SNOW/3 - Main Landing Gear Axle - Inspection and Modification\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)  Ayres Thrush (Snow) Commander Series Aeroplanes\n\n \n\nAD/AC-SNOW/3 Main Landing Gear Axle - Inspection\n\nand Modification Applicability: Models S-2C and S-2D with a wheel tread of 100 inches. Document:               Aero Commander - Olney Division SL No. 42.\n\nCompliance: Forthwith.\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\n8/66\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1939},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument remains strictly limited to its original technical purpose: addressing a specific airworthiness concern regarding the main landing gear axle on particular Ayres Thrush aircraft models. There is no evidence of scope expansion into broader operational requirements or additional aircraft types."},"complexity_factors":["Extremely brief substantive content (approximately 50 words of regulatory text)","Single, narrow applicability criterion limiting scope to two specific aircraft models with a specific technical configuration","No defined terms, interpretation clauses, or legislative cross-references","Single unqualified compliance requirement ('forthwith') with no exceptions, alternative methods, or phased implementation schedule","Only one external reference (manufacturer Service Letter No. 42)"],"plain_english_summary":"This mandatory safety order requires owners/operators of Ayres Thrush (Snow Commander) S-2C and S-2D aircraft with the 100‑inch wheel tread to immediately inspect and, if needed, modify the main landing gear axle per Aero Commander Service Letter No. 42.\n\nIt matters because axle cracking or failure can cause wheel collapse during takeoff, landing, or taxiing, creating a high risk of serious accident for affected aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-snow-3-main-landing-gear-axle-inspection-and-modification","history":"/api/acts/ad-ac-snow-3-main-landing-gear-axle-inspection-and-modification/history","analysis":"/api/acts/ad-ac-snow-3-main-landing-gear-axle-inspection-and-modification/analysis","conflicts":"/api/acts/ad-ac-snow-3-main-landing-gear-axle-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-ac-snow-3-main-landing-gear-axle-inspection-and-modification/important-cases","documents":"/api/acts/ad-ac-snow-3-main-landing-gear-axle-inspection-and-modification/documents"}}