{"id":"F2009L01512","name":"AD/R22/18 - Actuator Drive Screw A506-1 - Replacement - CANCELLED","slug":"ad-r22-18-actuator-drive-screw-a506-1-replacement-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78140,"registerId":"commonwealth-F2009L01512-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Robinson R22 Series Helicopters","sectionType":"division","heading":"Robinson R22 Series Helicopters","content":"### Robinson R22 Series Helicopters\n\n| AD/R22/18 | Actuator Drive Screw A506-1 - Replacement | 5/2009 |\n| --------- | ----------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                        |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 7 May 2009.                                                                                                                                                                                               |\n| Background:  | This unique Australian AD specified replacement of actuator drive screw A506-1 in accordance with Robinson SB No. 32 within 25 hours time in service, or by August 1983, whichever occurred sooner. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n27 March 2009","sortOrder":0},{"sectionNumber":"AD/R22/18","sectionType":"part","heading":"AD/R22/18","content":"## AD/R22/18","sortOrder":1},{"sectionNumber":"Actuator Drive Screw A506-1 - Replacemen","sectionType":"part","heading":"Actuator Drive Screw A506-1 - Replacement","content":"## Actuator Drive Screw A506-1 - Replacement","sortOrder":2},{"sectionNumber":"5/2009","sectionType":"part","heading":"5/2009","content":"## 5/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2031},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument performs exactly as intended—it removes a superseded maintenance requirement without expanding into new regulatory areas. The cancellation represents a reduction rather than growth in scope."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","No conditional logic, exceptions, or nested provisions","No cross-references to other legislation beyond the historical context"],"plain_english_summary":"**What this does:** This document officially cancels a previous safety rule (Airworthiness Directive AD/R22/18) affecting Robinson R22 helicopters.\n\n**The old rule:** Previously, owners had to replace a specific part—the \"actuator drive screw A506-1\"—within 25 flying hours or by August 1983 (whichever came first). This was required due to safety concerns identified in a manufacturer service bulletin (Robinson SB No. 32).\n\n**What changed:** As of 7 May 2009, helicopter owners no longer need to comply with this specific replacement requirement. The Civil Aviation Safety Authority (CASA) determined the rule was no longer necessary for safety.\n\n**Who is affected:** Owners and operators of Robinson R22 series helicopters who were previously subject to this maintenance directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-r22-18-actuator-drive-screw-a506-1-replacement-cancelled","history":"/api/acts/ad-r22-18-actuator-drive-screw-a506-1-replacement-cancelled/history","analysis":"/api/acts/ad-r22-18-actuator-drive-screw-a506-1-replacement-cancelled/analysis","conflicts":"/api/acts/ad-r22-18-actuator-drive-screw-a506-1-replacement-cancelled/conflicts","importantCases":"/api/acts/ad-r22-18-actuator-drive-screw-a506-1-replacement-cancelled/important-cases","documents":"/api/acts/ad-r22-18-actuator-drive-screw-a506-1-replacement-cancelled/documents"}}