{"id":"F2006B10311","name":"AD/GOV/4 - Flyweight Pin Retainer - Modification","slug":"ad-gov-4-flyweight-pin-retainer-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56043,"registerId":"commonwealth-F2006B10311-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GOV/4 - Flyweight Pin Retainer - Modification","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/4 Flyweight Pin Retainer - Modification 5/76\n\nApplicability: All Woodward governors P/N 8210-020.\n\n \n\nDocument: Allison Commercial Engine Bulletin 250-B17/B17B TP CEB-1051. Compliance: Before installation in an aircraft after 30 June 1976.\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":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1788},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains tightly focused on its original purpose: mandating a safety modification to the flyweight pin retainer on Woodward P/N 8210-020 governors. There is no indication of scope creep beyond this specific mechanical issue."},"complexity_factors":["Extremely short text (single requirement)","Relies entirely on external technical bulletin (CEB-1051) for implementation details","No conditional exceptions or nested clauses","Simple applicability test (single part number)"],"plain_english_summary":"**What this is:** An airworthiness directive (a mandatory safety order) requiring a specific mechanical modification to certain aircraft propeller governors.\n\n**Who it affects:** Aircraft maintenance engineers and operators installing Woodward propeller governors (part number 8210-020).\n\n**What it requires:** Before installing one of these governors in an aircraft after 30 June 1976, you must modify the **flyweight pin retainer** — a component that helps regulate engine speed and propeller pitch — following the instructions in Allison Commercial Engine Bulletin CEB-1051.\n\n**Why it matters:** This prevents the flyweight pin from coming loose, which could cause the governor to fail and lead to uncontrolled engine overspeed or loss of propeller pitch control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-gov-4-flyweight-pin-retainer-modification","history":"/api/acts/ad-gov-4-flyweight-pin-retainer-modification/history","analysis":"/api/acts/ad-gov-4-flyweight-pin-retainer-modification/analysis","conflicts":"/api/acts/ad-gov-4-flyweight-pin-retainer-modification/conflicts","importantCases":"/api/acts/ad-gov-4-flyweight-pin-retainer-modification/important-cases","documents":"/api/acts/ad-gov-4-flyweight-pin-retainer-modification/documents"}}