{"id":"F2006B05494","name":"AD/PA-23/67 - Throttle Control Shaft","slug":"ad-pa-23-67-throttle-control-shaft","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46331,"registerId":"commonwealth-F2006B05494-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/67 - Throttle Control Shaft","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)  Piper PA-23 (Apache and Aztec) Series Aeroplanes\n\n \n\nAD/PA-23/67 Throttle Control Shaft 4/75\n\nApplicability: All model PA23-250 with S/Nos. 27-7305074 to 27-7405460 (normally aspirated only).\n\n \n\nDocument: Piper SB No. 451.\n\n \n\nCompliance: Within 100 hours time in service after 30 April 1975.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1145},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope—addressing a specific mechanical defect in the throttle control assembly of particular Piper aircraft models. It has not expanded beyond this targeted safety purpose."},"complexity_factors":["Single discrete requirement with no sub-conditions","Narrow applicability limited to specific serial number range","No defined terms or interpretation section","Simple temporal compliance trigger (100 hours after fixed date)","References only one external technical document"],"plain_english_summary":"**What this is:** A mandatory safety instruction (called an Airworthiness Directive) requiring specific Piper Apache and Aztec aircraft owners to inspect or fix a problem with the throttle control shaft.\n\n**Who it affects:** Owners and operators of Piper PA-23-250 model aircraft with serial numbers between 27-7305074 and 27-7405460 (normally aspirated engines only).\n\n**What you must do:** Follow the instructions in Piper Service Bulletin No. 451 regarding the throttle control shaft. This typically involves inspecting for wear, cracks, or improper installation that could cause the throttle to fail in flight.\n\n**When:** You must complete this work within 100 hours of flying time after 30 April 1975.\n\n**Why it matters:** A faulty throttle control shaft could cause the engine power to become stuck or uncontrollable during flight, creating a serious safety risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-67-throttle-control-shaft","history":"/api/acts/ad-pa-23-67-throttle-control-shaft/history","analysis":"/api/acts/ad-pa-23-67-throttle-control-shaft/analysis","conflicts":"/api/acts/ad-pa-23-67-throttle-control-shaft/conflicts","importantCases":"/api/acts/ad-pa-23-67-throttle-control-shaft/important-cases","documents":"/api/acts/ad-pa-23-67-throttle-control-shaft/documents"}}