{"id":"F2009L01571","name":"AD/B-2/6 - Overunning Clutch - Modification and Cockpit Placard Amendment - CANCELLED","slug":"ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78307,"registerId":"commonwealth-F2009L01571-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Brantly B-2 Series Helicopters","sectionType":"division","heading":"Brantly B-2 Series Helicopters","content":"### Brantly B-2 Series Helicopters\n\n| AD/B-2/6 | Overunning Clutch - Modification andCockpit Placard Amendment | 5/2009 |\n| -------- | ------------------------------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                    |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 7 May 2009.                                                                                                                                                                                                                           |\n| Background:  | This AD, issued in 1960, required modification to the overrunning clutch and replacement of the cockpit placard in accordance with Brantly SL No. 1. The AD compliance was forthwith. As all aircraft would have been modified, 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/B-2/6","sectionType":"part","heading":"AD/B-2/6","content":"## AD/B-2/6","sortOrder":1},{"sectionNumber":"Overunning Clutch - Modification andCock","sectionType":"part","heading":"Overunning Clutch - Modification andCockpit Placard Amendment","content":"## Overunning Clutch - Modification and  \nCockpit Placard Amendment","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":2109},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a termination instrument that cancels the previous Airworthiness Directive without expanding, restricting, or altering its substantive scope. The original AD mandated specific safety modifications; this instrument simply recognises that universal compliance has been achieved and formally revokes the spent requirement."},"complexity_factors":["Single operative provision (cancellation of previous directive)","No defined terms or interpretation section","No conditional logic, exceptions, or cross-references","Extremely brief (under 150 words of substantive text)"],"plain_english_summary":"**What this does:** This instrument officially cancels a 1960 safety rule (Airworthiness Directive) that required owners of Brantly B-2 helicopters to modify the aircraft's overrunning clutch and replace a cockpit warning placard.\n\n**Who it affects:** Owners and operators of Brantly B-2 Series helicopters.\n\n**Why it matters:** The original safety requirement is no longer necessary because all affected helicopters have already been modified over the preceding 49 years. This cancellation removes an outdated compliance obligation, streamlining maintenance requirements for these aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment-cancelled","history":"/api/acts/ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment-cancelled/history","analysis":"/api/acts/ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment-cancelled/analysis","conflicts":"/api/acts/ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment-cancelled/conflicts","importantCases":"/api/acts/ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment-cancelled/important-cases","documents":"/api/acts/ad-b-2-6-overunning-clutch-modification-and-cockpit-placard-amendment-cancelled/documents"}}