{"id":"F2006B08840","name":"AD/DC4/33 - Nose Wheel Brace Strut Collar - Inspection","slug":"ad-dc4-33-nose-wheel-brace-strut-collar-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52314,"registerId":"commonwealth-F2006B08840-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DC4/33 - Nose Wheel Brace Strut Collar - 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)  Douglas DC4 Series Aeroplanes\n\n \n\n \n\n| AD/DC4/33 |  | Nose Wheel Brace Strut Collar - Inspection | NK |\n| --- | --- | --- | --- |\n| Document: | 1. | Douglas SB (C54) No. 209S and supplement dated 12 August 1946; or |  |\n|  | 2. | FAA AD 46-27-2; or |  |\n|  | 3. | ANO 105.1.16.2.6.1. |  |\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 \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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The source text defines a limited, specific scope: inspection of the nose wheel brace strut collar on Douglas DC‑4 series aeroplanes, with compliance to be demonstrated by following one of three listed documents (AD/DC4/33; Documents 1–3). The AD text provided does not indicate any expansion or narrowing of that scope relative to its stated content, nor does it include additional requirements beyond directing operators to the referenced compliance documents."},"complexity_factors":["Short, narrowly focused directive (inspection of a single component) reduces substantive complexity (AD/DC4/33 title).","Compliance requires consulting one of three external documents, increasing practical complexity (Document 1, Document 2, Document 3).","One referenced document is an old service bulletin with a 1946 supplement (Document 1), which may be harder to locate or interpret for modern operators.","Cross‑jurisdictional reference to an FAA AD (Document 2) introduces potential differences in drafting conventions and interpretation.","The AD delegates technical detail to referenced documents rather than including procedures in the text, concentrating decision‑making and interpretation on operators and maintainers."],"plain_english_summary":"This AD (AD/DC4/33) mandates inspection of the nose‑wheel brace strut collar on Douglas DC‑4 series aeroplanes, to be carried out in accordance with one of three referenced compliance documents. It applies to DC‑4 owners/operators and maintenance organisations — important because it is a regulatory safety requirement that creates inspection, repair and documentation costs and possible downtime."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This appears to be a standard Airworthiness Directive as originally intended — a targeted safety instruction for a specific aircraft component. No scope creep evident."},"complexity_factors":["Extremely short document — essentially a title and reference table","Only 3 technical references provided, with no procedural detail in the text itself","No defined terms, no conditional logic, no cross-referencing within the document","Single, clear subject matter: one inspection on one aircraft type","Content appears truncated or extracted — missing actual inspection instructions (which are contained in the referenced documents rather than this schedule entry)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nThis directive requires owners and operators of **Douglas DC-4 series aeroplanes** to inspect the **nose wheel brace strut collar** — a metal ring or fitting that helps secure the front landing gear strut.\n\n**Why it matters:**\nThe nose wheel strut supports the aircraft's front landing gear. If the collar fails or is damaged, it could cause landing gear collapse during takeoff or landing — a serious safety risk.\n\n**Who must comply:**\nAnyone operating a Douglas DC-4 aircraft in Australia must follow this directive. Compliance means performing the inspection specified in one of three referenced technical documents (a Douglas service bulletin, an FAA airworthiness directive, or an old Australian aviation order).\n\n**Key point:**\nAirworthiness Directives are legally binding. You cannot fly the aircraft until you comply with the inspection requirements."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dc4-33-nose-wheel-brace-strut-collar-inspection","history":"/api/acts/ad-dc4-33-nose-wheel-brace-strut-collar-inspection/history","analysis":"/api/acts/ad-dc4-33-nose-wheel-brace-strut-collar-inspection/analysis","conflicts":"/api/acts/ad-dc4-33-nose-wheel-brace-strut-collar-inspection/conflicts","importantCases":"/api/acts/ad-dc4-33-nose-wheel-brace-strut-collar-inspection/important-cases","documents":"/api/acts/ad-dc4-33-nose-wheel-brace-strut-collar-inspection/documents"}}