{"id":"F2006B02221","name":"AD/AC-SNOW/9 - Seat Travel Restriction - Modification","slug":"ad-ac-snow-9-seat-travel-restriction-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41451,"registerId":"commonwealth-F2006B02221-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC-SNOW/9 - Seat Travel Restriction - 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 5/1968,Aircraft below 5700 kg,Ayres Thrush (Snow) Commander Series Aeroplanes,Seat Travel Restriction - Modification,9\ntitle: Airworthiness Directive - AD/AC-SNOW/9 - Seat Travel Restriction - 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/9 Seat Travel Restriction - Modification 5/68\n\nApplicability: Model S-2D.\n\n \n\nDocument: Snow Commander (Aust) Dwg. No. 150. Compliance: 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 \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1882},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: a single safety modification (seat travel restriction) applied to a specific aircraft model (S-2D). No evidence of expansion to other models or unrelated systems."},"complexity_factors":["Incorporates external technical document by reference (Snow Commander Drawing No. 150) without reproducing specifications","Uses aviation-specific model designation (S-2D) and regulatory shorthand ('forthwith')","No interpretation section or definitions provided"],"plain_english_summary":"**What this does:** This is a mandatory safety order (called an *Airworthiness Directive*) that requires owners to modify the pilot's seat in specific agricultural aircraft.\n\n**Who it affects:** Owners and operators of Ayres Thrush (Snow) Commander **Model S-2D** aeroplanes.\n\n**What must be done:** You must install a modification that restricts how far the pilot's seat can slide forward and backward (seat travel). The work must follow the technical blueprint \"Snow Commander (Aust) Drawing No. 150\".\n\n**When:** Immediately — the directive uses the legal term \"forthwith\", meaning compliance is required as soon as possible without delay.\n\n**Why it matters:** This prevents the seat from sliding into a position where the pilot cannot properly reach the controls, which could cause loss of aircraft control during flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-snow-9-seat-travel-restriction-modification","history":"/api/acts/ad-ac-snow-9-seat-travel-restriction-modification/history","analysis":"/api/acts/ad-ac-snow-9-seat-travel-restriction-modification/analysis","conflicts":"/api/acts/ad-ac-snow-9-seat-travel-restriction-modification/conflicts","importantCases":"/api/acts/ad-ac-snow-9-seat-travel-restriction-modification/important-cases","documents":"/api/acts/ad-ac-snow-9-seat-travel-restriction-modification/documents"}}