{"id":"F2009L01913","name":"AD/B-2/7 - Main Rotor Blade Dampers - Installation - CANCELLED","slug":"ad-b-2-7-main-rotor-blade-dampers-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":79003,"registerId":"commonwealth-F2009L01913-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Brantly B-2 Series Helicopters","sectionType":"division","heading":"Brantly B-2 Series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-2/7 | Main Rotor Blade Dampers - Installation | 6/2009 |\n| -------- | --------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                           |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 4 June 2009.                                                                                                                                                                                                                                 |\n| Background:  | This AD, issued in 1960, required the installation of a revised main rotor damping system in accordance with Brantly SL No. 2 to reduce the blade swinging. 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\n24 April 2009","sortOrder":0},{"sectionNumber":"AD/B-2/7","sectionType":"part","heading":"AD/B-2/7","content":"## AD/B-2/7","sortOrder":1},{"sectionNumber":"Main Rotor Blade Dampers - Installation","sectionType":"part","heading":"Main Rotor Blade Dampers - Installation","content":"## Main Rotor Blade Dampers - 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":1359},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument performs exactly as intended: it formally terminates a specific, outdated airworthiness directive concerning Brantly B-2 helicopter rotor dampers. The scope remains precisely limited to that cancellation."},"complexity_factors":["Single operative provision (cancellation statement only)","No definitions section or interpretative provisions","No conditional logic, exceptions, or cross-references to other legislation","Document is purely administrative/remedial in nature"],"plain_english_summary":"**What this is:** This document formally cancels an old aircraft safety rule (called an **Airworthiness Directive** or AD) that applied to Brantly B-2 helicopters.\n\n**What the old rule required:** The original directive from 1960 forced owners to install an improved main rotor blade damping system (basically shock absorbers for the rotor blades) to reduce dangerous swinging or vibration.\n\n**What this document does:** It officially scraps that old rule effective 4 June 2009.\n\n**Why it matters:** The authority cancelled this rule because every affected helicopter was already modified decades ago. The cancellation simply cleans up the rulebook by removing a requirement that everyone has already met. No further action is required by aircraft owners."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b-2-7-main-rotor-blade-dampers-installation-cancelled","history":"/api/acts/ad-b-2-7-main-rotor-blade-dampers-installation-cancelled/history","analysis":"/api/acts/ad-b-2-7-main-rotor-blade-dampers-installation-cancelled/analysis","conflicts":"/api/acts/ad-b-2-7-main-rotor-blade-dampers-installation-cancelled/conflicts","importantCases":"/api/acts/ad-b-2-7-main-rotor-blade-dampers-installation-cancelled/important-cases","documents":"/api/acts/ad-b-2-7-main-rotor-blade-dampers-installation-cancelled/documents"}}