{"id":"F2009L01312","name":"AD/R22/10 - Tail Rotor Drive Shaft Damper Clips - Replacement - CANCELLED","slug":"ad-r22-10-tail-rotor-drive-shaft-damper-clips-replacement-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":122287,"registerId":"commonwealth-F2009L01312-current","compilationNumber":null,"startDate":"2026-04-03","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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Robinson R22 Series Helicopters","sectionType":"division","heading":"Robinson R22 Series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/R22/10 | Tail Rotor Drive ShaftDamper Clips - 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 tail rotor drive shaft damper clips in accordance with Robinson SB No. 14 within 25 hours time in service after November 1981. The AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n16 March 2009","sortOrder":0},{"sectionNumber":"AD/R22/10","sectionType":"part","heading":"AD/R22/10","content":"## AD/R22/10","sortOrder":1},{"sectionNumber":"Tail Rotor Drive ShaftDamper Clips - Rep","sectionType":"part","heading":"Tail Rotor Drive ShaftDamper Clips - Replacement","content":"## Tail Rotor Drive Shaft  \nDamper Clips - 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":1828},"content_quality":"ok","complexity_score":1,"rejection_reason":"","scope_assessment":{"changed":false,"description":"This instrument terminates the original airworthiness directive entirely rather than expanding its scope or purpose. The regulatory requirement has been cancelled completely."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","No conditional logic, cross-references, or exceptions","Extremely short (under 100 words of substantive content)"],"plain_english_summary":"**What this is:** This document officially cancels a previous aviation safety rule (called an Airworthiness Directive) that applied to Robinson R22 helicopters.\n\n**What it does:** It removes a requirement that previously forced owners and operators to replace **tail rotor drive shaft damper clips** (small components that help stabilize the tail rotor) within 25 flight hours after November 1981.\n\n**Who it affects:** Owners, operators, and maintenance engineers working on Robinson R22 series helicopters.\n\n**Why it matters:** As of 7 May 2009, you no longer need to follow this specific replacement rule. The Civil Aviation Safety Authority (CASA) has determined this safety requirement is no longer necessary—likely because the manufacturer issued different guidance or the safety risk has been addressed through other means."}},"importantCases":[],"_links":{"self":"/api/acts/ad-r22-10-tail-rotor-drive-shaft-damper-clips-replacement-cancelled","history":"/api/acts/ad-r22-10-tail-rotor-drive-shaft-damper-clips-replacement-cancelled/history","analysis":"/api/acts/ad-r22-10-tail-rotor-drive-shaft-damper-clips-replacement-cancelled/analysis","conflicts":"/api/acts/ad-r22-10-tail-rotor-drive-shaft-damper-clips-replacement-cancelled/conflicts","importantCases":"/api/acts/ad-r22-10-tail-rotor-drive-shaft-damper-clips-replacement-cancelled/important-cases","documents":"/api/acts/ad-r22-10-tail-rotor-drive-shaft-damper-clips-replacement-cancelled/documents"}}