{"id":"F2006B06418","name":"AD/R22/11 - Clutch Shaft Plug Installation - Inspection","slug":"ad-r22-11-clutch-shaft-plug-installation-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47781,"registerId":"commonwealth-F2006B06418-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/R22/11 - Clutch Shaft Plug Installation - 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)  Robinson R22 Series Helicopters\n\n \n\nAD/R22/11 Clutch Shaft Plug Installation - Inspection 2/82\n\nApplicability: Model R22 with S/Nos. 002 to 0226. Document:  Robinson Mandatory SB No. 16.\n\nCompliance: Within 25 hours time in service after 11 January 1982.\n\n \n\nBackground:  Incorrect fitment of a clutch shaft plug reduced the airspace available within the clutch housing, resulting in displacement of a clutch forward seal by fluid expansion during normal heat buildup.\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":1801},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow technical scope, addressing only the specific clutch shaft plug installation defect in the identified helicopter serial number range with no expansion to broader systems or aircraft types."},"complexity_factors":["Narrow applicability limited to specific serial numbers (002-0226)","Single mechanical component addressed","Straightforward compliance deadline (25 hours time in service)","Minimal cross-referencing (refers to only one service bulletin)","No conditional exceptions or nested definitions"],"plain_english_summary":"**What this is:** A mandatory safety directive (called an Airworthiness Directive) requiring owners of specific Robinson R22 helicopters to inspect and fix a clutch shaft plug installation defect.\n\n**Who it affects:** Anyone operating Robinson R22 helicopters with serial numbers 002 through 0226.\n\n**What you must do:** Ensure the clutch shaft plug is installed correctly per Robinson Mandatory Service Bulletin No. 16. This inspection and correction must be completed within 25 hours of flight time after 11 January 1982.\n\n**Why it matters:** If the plug is fitted incorrectly, it reduces the airspace inside the clutch housing. During normal flight, heat causes fluid to expand, which can push out the clutch forward seal. This could lead to clutch failure and loss of control.\n\n**The bottom line:** This is a critical, time-sensitive safety fix to prevent mechanical failure in affected helicopters."}},"importantCases":[],"_links":{"self":"/api/acts/ad-r22-11-clutch-shaft-plug-installation-inspection","history":"/api/acts/ad-r22-11-clutch-shaft-plug-installation-inspection/history","analysis":"/api/acts/ad-r22-11-clutch-shaft-plug-installation-inspection/analysis","conflicts":"/api/acts/ad-r22-11-clutch-shaft-plug-installation-inspection/conflicts","importantCases":"/api/acts/ad-r22-11-clutch-shaft-plug-installation-inspection/important-cases","documents":"/api/acts/ad-r22-11-clutch-shaft-plug-installation-inspection/documents"}}