{"id":"F2009L01311","name":"AD/R22/27 - Vertical Fin Attachments - CANCELLED","slug":"ad-r22-27-vertical-fin-attachments-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":122283,"registerId":"commonwealth-F2009L01311-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Robinson R22 Series Helicopters","sectionType":"division","heading":"Robinson R22 Series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/R22/27 | Vertical Fin Attachments | 5/2009 |\n| --------- | ------------------------ | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                            |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 7 May 2009.                                                                                                                                                                                                                                                                                   |\n| Background:  | This unique Australian AD specified dye-penetrant inspection of the vertical fin attachments at each maintenance release inspection. The inspection was not based on a Robinson service document. The small number of service difficulty reports resulting from these inspections does not justify retaining this AD. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n27 March 2009","sortOrder":0},{"sectionNumber":"AD/R22/27","sectionType":"part","heading":"AD/R22/27","content":"## AD/R22/27","sortOrder":1},{"sectionNumber":"Vertical Fin Attachments","sectionType":"part","heading":"Vertical Fin Attachments","content":"## Vertical Fin Attachments","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":1692},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument has a singular, narrow purpose: to revoke a previous Airworthiness Directive. It does not expand beyond the cancellation of AD/R22/27 or introduce new regulatory requirements."},"complexity_factors":["Single operative provision (cancellation)","No defined terms requiring interpretation","No cross-references to other legislation except the AD being cancelled","No conditional logic, exceptions, or procedural steps","Extremely short document with minimal substantive text"],"plain_english_summary":"**What this does:** This document officially cancels a previous safety rule (Airworthiness Directive AD/R22/27) that applied to Robinson R22 helicopters.\n\n**What was the old rule?** The cancelled rule required owners to perform a special crack-detection test (called \"dye-penetrant inspection\") on the vertical fin attachments (the bolts or fittings connecting the tail fin to the helicopter body) every time the aircraft underwent a maintenance release inspection (a routine safety check).\n\n**Why cancel it?** The Civil Aviation Safety Authority determined that:\n- This inspection requirement was unique to Australia (not based on the manufacturer's service documents)\n- Very few problems were actually discovered during these inspections\n- The safety benefit no longer justified the cost and effort for operators\n\n**Who is affected?** Owners and operators of Robinson R22 series helicopters who were previously required to conduct these inspections."}},"importantCases":[],"_links":{"self":"/api/acts/ad-r22-27-vertical-fin-attachments-cancelled","history":"/api/acts/ad-r22-27-vertical-fin-attachments-cancelled/history","analysis":"/api/acts/ad-r22-27-vertical-fin-attachments-cancelled/analysis","conflicts":"/api/acts/ad-r22-27-vertical-fin-attachments-cancelled/conflicts","importantCases":"/api/acts/ad-r22-27-vertical-fin-attachments-cancelled/important-cases","documents":"/api/acts/ad-r22-27-vertical-fin-attachments-cancelled/documents"}}