{"id":"F2006B10309","name":"AD/GOV/2 - Governor Body - Inspection","slug":"ad-gov-2-governor-body-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56038,"registerId":"commonwealth-F2006B10309-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GOV/2 - Governor Body - 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 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Propeller Governors\n\n \n\nAD/GOV/2 Governor Body - Inspection 9/71\n\nApplicability: All Hamilton Standard Two-Flyweight Model 4U18 and 5U18 Governors. Document:               1. Hamilton Standard SB No. 518; or\n\n2. FAA AD 57-16-4; or\n\n \n\n3. AD/PHS/4.\n\n \n\nCompliance: Before installation in an aircraft.\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 is a standalone Airworthiness Directive with a narrow, specific scope (inspection of two specific governor models). It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section","No cross-references to other legislation beyond three referenced technical documents","Simple conditional logic: single compliance requirement ('Before installation')","No exceptions or nested conditions","Single purpose: one inspection requirement for specific equipment models"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires a specific inspection of certain aircraft propeller governors (devices that control propeller speed) before they can be installed in an aircraft.\n\n**What it covers:**\n- **Equipment affected:** Hamilton Standard Two-Flyweight Model 4U18 and 5U18 propeller governors\n- **What must be done:** An inspection of the governor body\n- **When:** Before the governor is installed in any aircraft\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety instructions. If you own, operate, or maintain an aircraft with one of these governors, you must follow this directive or the aircraft cannot legally fly. This particular directive references older documents (a Hamilton Standard Service Bulletin from 1971, an FAA directive from 1957, and an earlier Australian directive), suggesting it addresses a known safety defect in these governor models.\n\n**Who needs to know:**\n- Aircraft maintenance engineers\n- Aircraft owners and operators\n- Parts suppliers and distributors handling these specific governor models"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text provided sets a clear, narrowly framed requirement: inspect all Hamilton Standard Two‑Flyweight Model 4U18 and 5U18 governors before installation using one of three named documents. There is no indication in the text that the AD expands or narrows that applicability beyond this stated scope."},"complexity_factors":["Narrow technical scope (only two governor models) reduces breadth of application.","Requirement is simple in form—one action: inspection—so low procedural complexity.","Compliance depends on external technical documents (SB No. 518, FAA AD 57‑16‑4, AD/PHS/4), which adds a retrieval and interpretation step.","Technical nature of the inspection requires specialist skills and potentially specialised tools.","Absence of procedural detail in the AD itself increases reliance on cross‑referenced material and recordkeeping practices."],"plain_english_summary":"This AD requires that all Hamilton Standard Two‑Flyweight Model 4U18 and 5U18 propeller governors be inspected under one of three referenced technical documents before they may be fitted to an aircraft. It affects installers, operators, maintenance organisations and parts suppliers, who must obtain/perform and document the inspection at their own cost to avoid fitting uninspected governors."}},"importantCases":[],"_links":{"self":"/api/acts/ad-gov-2-governor-body-inspection","history":"/api/acts/ad-gov-2-governor-body-inspection/history","analysis":"/api/acts/ad-gov-2-governor-body-inspection/analysis","conflicts":"/api/acts/ad-gov-2-governor-body-inspection/conflicts","importantCases":"/api/acts/ad-gov-2-governor-body-inspection/important-cases","documents":"/api/acts/ad-gov-2-governor-body-inspection/documents"}}