{"id":"F2006B06422","name":"AD/R22/17 - Clutch Lock Switch - Modification","slug":"ad-r22-17-clutch-lock-switch-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47793,"registerId":"commonwealth-F2006B06422-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/R22/17 - Clutch Lock Switch - 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 - 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/R22/17 Clutch Lock Switch - Modification 5/83\n\nApplicability: All model R22 Series with S/Nos. 0002 to 0225. Requirement:  Robinson S.B. 29.\n\nNote: Robinson Safety Notice No. 14 should be read in conjunction with the compliance document.\n\n \n\nCompliance: Within 25 hours time in service after 15th April 1983.\n\n \n\nBackground:  By allowing the actuator to be active in flight, it can maintain the proper belt tension and provide an important warning of an impending failure of the Vee-belts, actuator bearings, or other drive system components.\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":2125},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive remains tightly focused on its original purpose: mandating a specific hardware modification to prevent mechanical failure in the clutch system of affected helicopters. There is no expansion into unrelated operational or maintenance areas."},"complexity_factors":["Extremely short text (under 150 words of substantive content)","Single, unambiguous requirement (comply with Service Bulletin 29)","No definitions section or interpretive provisions","Applicability limited to a single aircraft model with specific serial numbers","One unconditional compliance deadline with no exceptions or alternative methods"],"plain_english_summary":"This **Airworthiness Directive** (a mandatory safety order) requires a critical modification to the clutch system on specific Robinson R22 helicopters.\n\n**Who it affects:** Owners and operators of Robinson R22 helicopters with serial numbers 0002 through 0225.\n\n**What you must do:** Carry out the modification detailed in Robinson Service Bulletin 29. This changes the clutch lock switch so the **actuator** (the mechanical device that adjusts the clutch) stays active during flight rather than being disabled.\n\n**Why this matters:** Keeping the actuator active maintains proper tension on the drive belts and provides an early warning if belts, bearings, or other drive components are about to fail. Without this fix, critical mechanical failures could occur in flight without warning.\n\n**Compliance deadline:** Within 25 hours of flying time after 15 April 1983."}},"importantCases":[],"_links":{"self":"/api/acts/ad-r22-17-clutch-lock-switch-modification","history":"/api/acts/ad-r22-17-clutch-lock-switch-modification/history","analysis":"/api/acts/ad-r22-17-clutch-lock-switch-modification/analysis","conflicts":"/api/acts/ad-r22-17-clutch-lock-switch-modification/conflicts","importantCases":"/api/acts/ad-r22-17-clutch-lock-switch-modification/important-cases","documents":"/api/acts/ad-r22-17-clutch-lock-switch-modification/documents"}}