{"id":"F2006B10149","name":"AD/GA-7/5 - Propeller Control Ball Joint - Replacement","slug":"ad-ga-7-5-propeller-control-ball-joint-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55724,"registerId":"commonwealth-F2006B10149-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GA-7/5 - Propeller Control Ball Joint - Replacement","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)  Gulfstream (Grumman American) GA-7 Series Aeroplanes\n\n \n\nAD/GA-7/5 Propeller Control Ball Joint - Replacement NK\n\nApplicability: Model GA-7 with S/Nos. GA7-0001 to GA7-0069. Document:  GAC SB No. ME-12.\n\nCompliance: Within 100 hours time in service after 31 March 1979.\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":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1283},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope as a specific airworthiness maintenance requirement. It addresses exactly what the title indicates—replacement of a propeller control ball joint for a defined aircraft population—and has not expanded beyond this safety-critical maintenance task."},"complexity_factors":["Single, unambiguous compliance action (replace specific part)","Extremely limited applicability (only 69 aircraft by specific serial number)","No conditional logic, exceptions, or nested provisions","References external technical document (service bulletin) rather than defining complex technical standards internally","Very short length (approximately 50 words of substantive regulatory text)"],"plain_english_summary":"This is a mandatory safety directive (called an **Airworthiness Directive**) issued by the Civil Aviation Safety Authority for specific Gulfstream aircraft.\n\n**What it requires:**\nOwners or operators of **Model GA-7 aircraft with serial numbers GA7-0001 through GA7-0069** must replace the **propeller control ball joint**. This is a mechanical component that connects the pilot's throttle/propeller controls to the engine.\n\n**When to do it:**\nThe replacement must be completed within **100 hours of flight time** after 31 March 1979.\n\n**Why it matters:**\nThe directive references a manufacturer service bulletin (GAC SB No. ME-12), indicating a discovered defect or wear pattern in the original ball joint that could cause loss of propeller control, potentially leading to engine failure or loss of aircraft control.\n\n**Who is affected:**\nOnly operators of the 69 specific aircraft identified by serial number in the applicability section."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ga-7-5-propeller-control-ball-joint-replacement","history":"/api/acts/ad-ga-7-5-propeller-control-ball-joint-replacement/history","analysis":"/api/acts/ad-ga-7-5-propeller-control-ball-joint-replacement/analysis","conflicts":"/api/acts/ad-ga-7-5-propeller-control-ball-joint-replacement/conflicts","importantCases":"/api/acts/ad-ga-7-5-propeller-control-ball-joint-replacement/important-cases","documents":"/api/acts/ad-ga-7-5-propeller-control-ball-joint-replacement/documents"}}