{"id":"F2006B06427","name":"AD/R22/21 Amdt 2 - Sprag Clutch Replacement","slug":"ad-r22-21-amdt-2-sprag-clutch-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47809,"registerId":"commonwealth-F2006B06427-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/R22/21 Amdt 2 - Sprag Clutch 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/R22/21\n\nAmdt 2\n\n\nSprag Clutch Replacement  12/85 DM\n\n \n\nApplicability: As detailed in the Requirement Document. Requirement: Robinson Service Bulletin 46.\n\nCompliance: Before further flight after 31st January 1986.\n\n \n\nBackground:  SB42A required the owners of the affected rotorcraft to perform certain manoeuvres and checks with their aircraft to determine if it was equipped with one of the suspect clutches. The manufacturer now requires that the affected clutches be replaced.\n\nAircraft which already have had the new A188-2 sprag clutch installed are excluded.\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":2470},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment updates the compliance method from inspection (under Service Bulletin 42A) to mandatory replacement (under Service Bulletin 46) but remains strictly focused on the original purpose of addressing unsafe sprag clutches in Robinson R22 helicopters. It does not expand to cover other aircraft types, components, or operational matters."},"complexity_factors":["Extremely short text (under 150 words)","Single mechanical requirement with no conditional logic","Only one external cross-reference (Service Bulletin 46)","Simple categorical exemption (A188-2 clutches)","Absolute compliance deadline with no exceptions or extensions"],"plain_english_summary":"**What this is:** A mandatory safety order (an Airworthiness Directive) issued by the Civil Aviation Safety Authority for owners of Robinson R22 helicopters.\n\n**What it requires:** You must replace faulty sprag clutches (a mechanical one-way bearing component in the rotor system) according to the manufacturer's Service Bulletin 46.\n\n**Who it affects:** Owners of Robinson R22 series helicopters equipped with the suspect clutches. If your aircraft already has the new **A188-2** sprag clutch installed, you are exempt.\n\n**Deadline:** The replacement must be completed **before further flight after 31st January 1986**.\n\n**Why it matters:** Earlier safety bulletins required pilots to perform checks to identify these clutches. This directive makes replacement mandatory because the manufacturer determined the suspect clutches pose a safety risk that inspection alone cannot mitigate."}},"importantCases":[],"_links":{"self":"/api/acts/ad-r22-21-amdt-2-sprag-clutch-replacement","history":"/api/acts/ad-r22-21-amdt-2-sprag-clutch-replacement/history","analysis":"/api/acts/ad-r22-21-amdt-2-sprag-clutch-replacement/analysis","conflicts":"/api/acts/ad-r22-21-amdt-2-sprag-clutch-replacement/conflicts","importantCases":"/api/acts/ad-r22-21-amdt-2-sprag-clutch-replacement/important-cases","documents":"/api/acts/ad-r22-21-amdt-2-sprag-clutch-replacement/documents"}}