{"id":"F2009L04590","name":"AD/RB211/41 - Engine - Thrust Reverser Unit - CANCELLED","slug":"ad-rb211-41-engine-thrust-reverser-unit-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":82443,"registerId":"commonwealth-F2009L04590-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Rolls Royce Turbine Engines - RB211 Seri","sectionType":"division","heading":"Rolls Royce Turbine Engines - RB211 Series","content":"### Rolls Royce Turbine Engines - RB211 Series\n\n| AD/RB211/41 | Engine - Thrust Reverser Unit | 25/2009 |\n| ----------- | ----------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                  |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 14 December 2009.                                                                                                                                                                                                                                                                   |\n| Background:  | A State of Design airworthiness directive issued on or after 1 October 2009 is defined as an airworthiness directive per CASR Part 39.001A. The requirements of this airworthiness directive which were referred to in EASA AD 2009-0089 have been superseded by EASA AD 2009-0253 issued 30 November 2009. |\n\n![](image.001.png)\n\nWilliam David  \nDelegate of the Civil Aviation Safety Authority\n\n08 December 2009","sortOrder":0},{"sectionNumber":"AD/RB211/41","sectionType":"part","heading":"AD/RB211/41","content":"## AD/RB211/41","sortOrder":1},{"sectionNumber":"Engine - Thrust Reverser Unit","sectionType":"part","heading":"Engine - Thrust Reverser Unit","content":"## Engine - Thrust Reverser Unit","sortOrder":2},{"sectionNumber":"25/2009","sectionType":"part","heading":"25/2009","content":"## 25/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1300},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument revokes a previous airworthiness directive rather than expanding regulatory scope. It eliminates a superseded requirement, reducing rather than increasing regulatory burden."},"complexity_factors":["Single operative provision (cancellation only)","No substantive regulatory requirements or obligations","No defined terms or interpretation section","Minimal cross-referencing (only cites superseding EASA AD)"],"plain_english_summary":"**What this does:** This document officially cancels a previous aviation safety rule (Airworthiness Directive AD/RB211/41) that applied to Rolls Royce RB211 jet engines.\n\n**Who it affects:** Airlines and maintenance providers operating aircraft with Rolls Royce RB211 engines, specifically regarding the **thrust reverser units** (the components that help slow the aircraft after landing by redirecting engine thrust forward).\n\n**Why it matters:** The old Australian safety requirement is no longer necessary because it has been replaced by a newer European aviation safety rule (EASA AD 2009-0253). This cancellation prevents duplicate or conflicting standards and ensures Australian operators follow the current European directive instead."}},"importantCases":[],"_links":{"self":"/api/acts/ad-rb211-41-engine-thrust-reverser-unit-cancelled","history":"/api/acts/ad-rb211-41-engine-thrust-reverser-unit-cancelled/history","analysis":"/api/acts/ad-rb211-41-engine-thrust-reverser-unit-cancelled/analysis","conflicts":"/api/acts/ad-rb211-41-engine-thrust-reverser-unit-cancelled/conflicts","importantCases":"/api/acts/ad-rb211-41-engine-thrust-reverser-unit-cancelled/important-cases","documents":"/api/acts/ad-rb211-41-engine-thrust-reverser-unit-cancelled/documents"}}