{"id":"F2006B06423","name":"AD/R22/18 - Actuator Drive Screw A506-1 - Replacement","slug":"ad-r22-18-actuator-drive-screw-a506-1-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47797,"registerId":"commonwealth-F2006B06423-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/R22/18 - Actuator Drive Screw A506-1 - 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)  Robinson R22 Series Helicopters\n\n \n\nAD/R22/18 Actuator Drive Screw A506-1 - Replacement 9/83\n\nApplicability: All Robinson R22 models fitted with A051 series actuators, S/No. 152 through 346 (actuator serial numbers).\n\n \n\nRequirement: Robinson Service Bulletin 32.\n\n \n\nCompliance: Within 25 hours time in service or the 31st August 1983 whichever is the sooner.\n\n \n\nBackground:  The manufacturer advises that there are a number of actuators in service which may have faulty drive screws installed.\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":2033},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive maintains its original, narrowly defined scope: addressing a specific mechanical defect (faulty drive screws) in a limited population of aircraft (specific serial numbers). There is no evidence of scope expansion beyond the original safety purpose."},"complexity_factors":["Extremely brief document (under 100 words of substantive content)","No defined terms, interpretation section, or legal jargon","Single, unambiguous compliance requirement","No conditional logic, exceptions, or nested provisions","Only one external reference (manufacturer's Service Bulletin 32)"],"plain_english_summary":"This is a **mandatory safety order** (an Airworthiness Directive) requiring owners of specific Robinson R22 helicopters to replace a potentially dangerous part.\n\n**Who it affects:**\nOwners and operators of Robinson R22 helicopters fitted with A051 series actuators with serial numbers 152 through 346.\n\n**What you must do:**\nReplace the A506-1 actuator drive screw according to the manufacturer's Service Bulletin 32. This must be done within 25 hours of flight time **or** by 31 August 1983, whichever comes first.\n\n**Why it matters:**\nThe manufacturer discovered that some drive screws were faulty. This directive prevents potential mechanical failures that could compromise flight safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-r22-18-actuator-drive-screw-a506-1-replacement","history":"/api/acts/ad-r22-18-actuator-drive-screw-a506-1-replacement/history","analysis":"/api/acts/ad-r22-18-actuator-drive-screw-a506-1-replacement/analysis","conflicts":"/api/acts/ad-r22-18-actuator-drive-screw-a506-1-replacement/conflicts","importantCases":"/api/acts/ad-r22-18-actuator-drive-screw-a506-1-replacement/important-cases","documents":"/api/acts/ad-r22-18-actuator-drive-screw-a506-1-replacement/documents"}}