{"id":"F2007L04397","name":"AD/DAUPHIN/77 - Main GearBox (MGB) Planet Gear Carrier - CANCELLED","slug":"ad-dauphin-77-main-gearbox-mgb-planet-gear-carrier-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":70736,"registerId":"commonwealth-F2007L04397-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DAUPHIN/77 - Main GearBox (MGB) Planet Gear Carrier - CANCELLED","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 20.2\ntitle: AIRCRAFT\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\n \n\nAIRWORTHINESS DIRECTIVE\n\nOn the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive AD/DAUPHIN/77.\n\n### Eurocopter SA 360 and SA 365 (Dauphin) Series Helicopters\n\n| AD/DAUPHIN/77 | Main Gearbox (MGB) Planet Gear Carrier | 1/2008 TX |\n| --- | --- | --- |\n\n\n \n\n| Requirement: | CANCELLED. |\n| --- | --- |\n|  | This AD is cancelled on 21 November 2007. |\n| Background: | This AD has been superseded by AD/DAUPHIN/94. |\n\n\n![](image.001.png)\n\nDavid Punshon  Delegate of the Civil Aviation Safety Authority\n\n16 November 2007\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1921},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument performs a straightforward cancellation of a previous directive without expanding regulatory scope or introducing new substantive requirements. It simply terminates the effect of AD/DAUPHIN/77 as of the specified date."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic, exceptions, or procedural steps","Minimal length (less than 200 words)","Only one external reference (the superseding AD/DAUPHIN/94)"],"plain_english_summary":"**This document cancels a previous aviation safety rule.**\n\nThe Civil Aviation Safety Authority (CASA) has cancelled Airworthiness Directive (AD) number 77, which previously required specific safety actions for the Main GearBox Planet Gear Carrier on Eurocopter SA 360 and SA 365 (Dauphin) series helicopters.\n\n**What this means:**\n*   **For aircraft owners and operators:** You no longer need to follow the requirements of AD/DAUPHIN/77.\n*   **Why:** It has been replaced by a newer safety directive (AD/DAUPHIN/94), which contains updated requirements.\n*   **Effective date:** The cancellation took effect on 21 November 2007.\n\nThis is a housekeeping measure to prevent confusion between the old and new rules and ensure operators follow only the current safety standards."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dauphin-77-main-gearbox-mgb-planet-gear-carrier-cancelled","history":"/api/acts/ad-dauphin-77-main-gearbox-mgb-planet-gear-carrier-cancelled/history","analysis":"/api/acts/ad-dauphin-77-main-gearbox-mgb-planet-gear-carrier-cancelled/analysis","conflicts":"/api/acts/ad-dauphin-77-main-gearbox-mgb-planet-gear-carrier-cancelled/conflicts","importantCases":"/api/acts/ad-dauphin-77-main-gearbox-mgb-planet-gear-carrier-cancelled/important-cases","documents":"/api/acts/ad-dauphin-77-main-gearbox-mgb-planet-gear-carrier-cancelled/documents"}}