{"id":"F2006B06547","name":"AD/RB211/17 - Intermediate Pressure Compressor Stage 6-7 Rotor Shafts","slug":"ad-rb211-17-intermediate-pressure-compressor-stage-6-7-rotor-shafts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48255,"registerId":"commonwealth-F2006B06547-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/RB211/17 - Intermediate Pressure Compressor Stage 6-7 Rotor Shafts","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Rolls Royce Turbine Engines - RB211 Series\n\n \n\nAD/RB211/17 Intermediate Pressure Compressor\n\nStage 6-7 Rotor Shafts\n\n\n10/95\n\n \n\nRequirement: CANCELLED.\n\n \n\nBackground: The requirements of this Directive are now reflected in the Rolls Royce RB211 Time Limits Manual, chapter 5-10-01 and CAO 106, AD/ENG/7 refers.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The instrument cancels the previous AD (removing it as the direct source of requirements) and transfers the operative requirements to the Rolls Royce RB211 Time Limits Manual (chapter 5-10-01) and to CAO 106 by reference to AD/ENG/7. Mechanically, the scope of this particular AD is reduced to administrative cancellation and redirection; the substantive maintenance/time-limit requirements continue elsewhere as indicated (Requirement: CANCELLED; Background: ...Time Limits Manual ... CAO 106 ...)."},"complexity_factors":["Directive content is minimal (single-line cancellation), reducing textual complexity.","Operative requirements have been moved to external documents (Rolls Royce RB211 Time Limits Manual ch.5-10-01 and CAO 106 AD/ENG/7), requiring consultation of other sources to determine actual obligations.","No transitional, enforcement, or implementation detail is provided in this AD, creating potential ambiguity about practical compliance steps.","Cross-reference to manufacturer material and another AD increases procedural complexity for affected parties despite the AD itself being short."],"plain_english_summary":"This AD cancels the earlier directive on Rolls‑Royce RB211 intermediate‑pressure compressor stage 6–7 rotor shafts and directs readers to the Rolls‑Royce RB211 Time Limits Manual (ch. 5‑10‑01) and CAO 106 (AD/ENG/7) for the operative requirements.\n\nIt affects operators, maintenance organisations and compliance officers who must now consult those external documents for mandatory maintenance, intervals and limits — shifting where legal/technical obligations are found and enforced."},"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a cancellation notice for a specific Airworthiness Directive. The scope has not expanded; rather, the directive has been terminated and its requirements absorbed into standard maintenance documentation (Time Limits Manual) and other regulatory instruments (CAO 106, AD/ENG/7). This represents consolidation, not scope creep."},"complexity_factors":["Document is only 4 substantive lines long","No defined terms section","No conditional logic or cross-references to legislation sections","Single straightforward status update (cancellation notice)","No operative provisions — purely administrative/archival"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety instruction issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it covers:** This specific directive (AD/RB211/17) originally applied to **Rolls-Royce RB211 jet engines**, specifically concerning the **Intermediate Pressure Compressor Stage 6-7 Rotor Shafts** — a critical rotating component inside the engine.\n\n**What it does now:** **Nothing.** This directive has been **cancelled** (made inactive). The safety requirements that used to be in this directive have been moved into:\n- The official Rolls-Royce **Time Limits Manual** (chapter 5-10-01), and\n- **CAO 106** (Civil Aviation Order 106) and another directive called **AD/ENG/7**.\n\n**Who it affects:** Airlines and aircraft operators using Rolls-Royce RB211 engines (commonly found on Boeing 747, 757, 767 and Lockheed L-1011 aircraft).\n\n**Why it matters:** Airworthiness Directives are legally binding safety rules. When one is cancelled, operators must follow the replacement requirements instead. This cancellation streamlines compliance by moving the rules into standard maintenance manuals rather than a standalone directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-rb211-17-intermediate-pressure-compressor-stage-6-7-rotor-shafts","history":"/api/acts/ad-rb211-17-intermediate-pressure-compressor-stage-6-7-rotor-shafts/history","analysis":"/api/acts/ad-rb211-17-intermediate-pressure-compressor-stage-6-7-rotor-shafts/analysis","conflicts":"/api/acts/ad-rb211-17-intermediate-pressure-compressor-stage-6-7-rotor-shafts/conflicts","importantCases":"/api/acts/ad-rb211-17-intermediate-pressure-compressor-stage-6-7-rotor-shafts/important-cases","documents":"/api/acts/ad-rb211-17-intermediate-pressure-compressor-stage-6-7-rotor-shafts/documents"}}