{"id":"F2009L02852","name":"AD/AS 355/26 Amdt 1 - Tail Rotor Control Spider - CANCELLED","slug":"ad-as-355-26-amdt-1-tail-rotor-control-spider-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":80173,"registerId":"commonwealth-F2009L02852-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter AS 355 (Twin Ecureuil) Series","sectionType":"division","heading":"Eurocopter AS 355 (Twin Ecureuil) Series Helicopters","content":"### Eurocopter AS 355 (Twin Ecureuil) Series Helicopters\n\n| AD/AS 355/26 Amdt 1 | Tail Rotor Control Spider | 8/2009 |\n| ------------------- | ------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                     |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n|              | This AD is cancelled on 30 July 2009.                                                                                                                                                                                                                                          |\n| Background:  | This unique Australian AD specified inspection within 100 hours time in service after July 1987; and on any occasion the tail rotor control spider assembly was installed. Aerospatiale telexes 11185 and 11538, both dated 1987, were relevant. The AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n18 June 2009","sortOrder":0},{"sectionNumber":"AD/AS 355/26 Amdt 1","sectionType":"part","heading":"AD/AS 355/26 Amdt 1","content":"## AD/AS 355/26 Amdt 1","sortOrder":1},{"sectionNumber":"Tail Rotor Control Spider","sectionType":"part","heading":"Tail Rotor Control Spider","content":"## Tail Rotor Control Spider","sortOrder":2},{"sectionNumber":"8/2009","sectionType":"part","heading":"8/2009","content":"## 8/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2159},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the directive entirely rather than expanding its scope. The original legislation mandated specific safety inspections; this version simply cancels those requirements because they are no longer required for aviation safety."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","No conditional logic, exceptions, or cross-references to other legislation","Extremely short length with minimal substantive text"],"plain_english_summary":"**What this does:** This document cancels a previous aviation safety rule that required helicopter operators to inspect the tail rotor control spider on specific Eurocopter AS 355 helicopters.\n\n**Who it affects:** Owners and operators of Eurocopter AS 355 (Twin Ecureuil) series helicopters.\n\n**Key details:**\n- **Cancels** the previous Airworthiness Directive (AD/AS 355/26) effective 30 July 2009\n- **Removes** the requirement to inspect the tail rotor control spider assembly every 100 flight hours or whenever it was installed\n- **Stops** the mandatory compliance with manufacturer telexes 11185 and 11538 from 1987\n\n**Why it matters:** The safety inspections are no longer necessary, likely because manufacturer service bulletins have superseded the requirement or the affected components are no longer in widespread service. This reduces maintenance costs and administrative burden for helicopter operators while maintaining safety standards."}},"importantCases":[],"_links":{"self":"/api/acts/ad-as-355-26-amdt-1-tail-rotor-control-spider-cancelled","history":"/api/acts/ad-as-355-26-amdt-1-tail-rotor-control-spider-cancelled/history","analysis":"/api/acts/ad-as-355-26-amdt-1-tail-rotor-control-spider-cancelled/analysis","conflicts":"/api/acts/ad-as-355-26-amdt-1-tail-rotor-control-spider-cancelled/conflicts","importantCases":"/api/acts/ad-as-355-26-amdt-1-tail-rotor-control-spider-cancelled/important-cases","documents":"/api/acts/ad-as-355-26-amdt-1-tail-rotor-control-spider-cancelled/documents"}}