{"id":"F2009L01845","name":"AD/B-2/27 - Tail Rotor Blades Strike Indicators - Installation - CANCELLED","slug":"ad-b-2-27-tail-rotor-blades-strike-indicators-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78855,"registerId":"commonwealth-F2009L01845-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Brantly B-2 Series Helicopters","sectionType":"division","heading":"Brantly B-2 Series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-2/27 | Tail Rotor Blades StrikeIndicators - Installation | 6/2009 |\n| --------- | ------------------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                                   |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 4 June 2009.                                                                                                                                                                                                                                                                                         |\n| Background:  | This AD, issued in 1968, required installation of tail strike indicators in accordance with Brantly SL No.73 to provide positive indication of minor tail rotor strikes. The AD compliance was within 100 hours time in service after 21 March 1968. As all aircraft would have been modified, the AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n17 April 2009","sortOrder":0},{"sectionNumber":"AD/B-2/27","sectionType":"part","heading":"AD/B-2/27","content":"## AD/B-2/27","sortOrder":1},{"sectionNumber":"Tail Rotor Blades StrikeIndicators - Ins","sectionType":"part","heading":"Tail Rotor Blades StrikeIndicators - Installation","content":"## Tail Rotor Blades Strike  \nIndicators - Installation","sortOrder":2},{"sectionNumber":"6/2009","sectionType":"part","heading":"6/2009","content":"## 6/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1541},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument terminates existing requirements without expanding coverage or adding new obligations. It simply removes an obsolete compliance burden that no longer applies to any aircraft."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation sections","No cross-references to other legislation","No conditional logic, exceptions, or subordinate provisions"],"plain_english_summary":"This document **cancels an old aviation safety rule** that applied to Brantly B-2 Series Helicopters.\n\n**What the rule required:**\nSince 1968, owners of these helicopters had to install \"tail rotor strike indicators\"—devices that warn pilots of minor impacts or strikes on the tail rotor blades.\n\n**Why it is being cancelled:**\nThe original directive gave operators 100 flying hours to install the indicators after March 1968. Because all affected helicopters would have been modified decades ago, the requirement is now redundant.\n\n**What this means:**\nOperators are no longer legally required to follow this specific directive. The Civil Aviation Safety Authority has formally removed the obligation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b-2-27-tail-rotor-blades-strike-indicators-installation-cancelled","history":"/api/acts/ad-b-2-27-tail-rotor-blades-strike-indicators-installation-cancelled/history","analysis":"/api/acts/ad-b-2-27-tail-rotor-blades-strike-indicators-installation-cancelled/analysis","conflicts":"/api/acts/ad-b-2-27-tail-rotor-blades-strike-indicators-installation-cancelled/conflicts","importantCases":"/api/acts/ad-b-2-27-tail-rotor-blades-strike-indicators-installation-cancelled/important-cases","documents":"/api/acts/ad-b-2-27-tail-rotor-blades-strike-indicators-installation-cancelled/documents"}}