{"id":"F2005L03147","name":"AD/BR700/6 - Independent Overspeed Protection - CANCELLED","slug":"ad-br700-6-independent-overspeed-protection-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":134354,"registerId":"commonwealth-F2005L03147-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Rolls Royce Germany Turbine Engines - BR","sectionType":"division","heading":"Rolls Royce Germany Turbine Engines - BR700 Series","content":"### Rolls Royce Germany Turbine Engines - BR700 Series\n\n| AD/BR700/6 | Independent Overspeed Protection | 12/2005 |\n| ---------- | -------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                 |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n|              | This AD is cancelled on 24 November 2005.                                                                                                                                                                                                  |\n|              | Note: LBA AD D-2005-221 R1 (EASA Approval 2005-6249) refers.                                                                                                                                                                               |\n| Background:  | The German Luftfahrt-Bundesamt (LBA) has been informed by Rolls-Royce Deutschland that all affected independent overspeed protection (IOP) units have been replaced. The LBA has cancelled AD D-2005-221 as no further action is required. |\n\n![](image.001.png)\n\nJayaprakashan Ambali  \nDelegate of the Civil Aviation Safety Authority\n\n4 October 2005","sortOrder":0},{"sectionNumber":"AD/BR700/6","sectionType":"part","heading":"AD/BR700/6","content":"## AD/BR700/6","sortOrder":1},{"sectionNumber":"Independent Overspeed Protection","sectionType":"part","heading":"Independent Overspeed Protection","content":"## Independent Overspeed Protection","sortOrder":2},{"sectionNumber":"12/2005","sectionType":"part","heading":"12/2005","content":"## 12/2005","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1334},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument performs its stated function of formally cancelling a superseded airworthiness directive after the underlying safety issue was resolved through hardware replacement. No scope creep detected."},"complexity_factors":["Single administrative action (cancellation only)","No defined terms or interpretation section","No conditional provisions, exceptions, or cross-references to other legislation","Extremely short (less than one page)"],"plain_english_summary":"This document officially cancels a previous aviation safety rule (Airworthiness Directive AD/BR700/6) that required checks or fixes for independent overspeed protection units in Rolls-Royce BR700 series jet engines. The German aviation authority confirmed that all affected units have been replaced, so the safety rule is no longer necessary. The cancellation took effect on 24 November 2005. This affects airlines and aircraft operators using these specific engines, essentially telling them they no longer need to comply with the previous directive.\n\n**Key points:**\n- **What:** Cancellation of a safety directive about engine overspeed protection\n- **Who:** Operators of aircraft with Rolls-Royce BR700 series engines  \n- **Why:** The safety issue has been resolved—all problematic parts have been replaced\n- **When:** Effective 24 November 2005"}},"importantCases":[],"_links":{"self":"/api/acts/ad-br700-6-independent-overspeed-protection-cancelled","history":"/api/acts/ad-br700-6-independent-overspeed-protection-cancelled/history","analysis":"/api/acts/ad-br700-6-independent-overspeed-protection-cancelled/analysis","conflicts":"/api/acts/ad-br700-6-independent-overspeed-protection-cancelled/conflicts","importantCases":"/api/acts/ad-br700-6-independent-overspeed-protection-cancelled/important-cases","documents":"/api/acts/ad-br700-6-independent-overspeed-protection-cancelled/documents"}}