{"id":"F2006B06564","name":"AD/RB211/4 Amdt 6 - Group A Parts","slug":"ad-rb211-4-amdt-6-group-a-parts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48317,"registerId":"commonwealth-F2006B06564-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/RB211/4 Amdt 6 - Group A Parts","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\n# AD/RB211/4\n\nAmdt 6\n\nRequirement: CANCELLED.\n\n# Group “A” Parts 3/95\n\n \n\nBackground: This Directive is cancelled. The requirement for the control of turbine engine life limited components is now covered by AD/ENG/7.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a cancellation instrument that explicitly narrows the regulatory footprint by withdrawing requirements. The scope has not expanded; rather, it has been deliberately eliminated and transferred to AD/ENG/7."},"complexity_factors":["Document is only 4 substantive lines long","No defined terms section","No cross-references to other legislation (only a single reference to replacement directive AD/ENG/7)","No conditional logic or exceptions","Single operative word: \"CANCELLED\"","Minimal regulatory text — essentially a formal withdrawal notice"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) that tells aircraft operators what they must do to keep their planes airworthy.\n\n**What it does:** This particular directive **cancels itself**. It officially withdraws a previous safety requirement that applied to Rolls-Royce RB211 turbine engines (the engines used on many Boeing 747s, for example).\n\n**Who it affects:** Airlines and operators using Rolls-Royce RB211 engines on Australian-registered aircraft.\n\n**Why it matters:** The old rule required tracking of \"Group A Parts\" — critical engine components with limited lifespans that must be replaced before they fail. Instead of maintaining this separate directive, CASA has consolidated this requirement into a broader directive called **AD/ENG/7**. This simplifies the rules — operators now follow one directive instead of two for engine life-limited parts.\n\n**Key takeaway:** If you're an operator, you don't follow this directive anymore. You follow AD/ENG/7 instead."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The scope has changed from a directive specifically imposing controls under AD/RB211/4 to a cancellation that transfers the applicable control requirements to AD/ENG/7. The entry explicitly states the cancellation (\"Requirement: CANCELLED.\") and that the control of turbine engine life‑limited components is now covered by AD/ENG/7 (\"Background: ... now covered by AD/ENG/7.\"). As a result, the governing instrument for those controls is different even though the regulatory obligation to follow an applicable AD remains."},"complexity_factors":["Document text is very short and procedural (single cancelled requirement).","Cross‑reference to another instrument (AD/ENG/7) requires readers to consult a separate directive for operative technical details.","Regulatory context is explicit (CASA airworthiness directive), but the entry contains no technical or procedural detail itself.","Identification of affected equipment is narrow and specific (Rolls‑Royce RB211 series, Group “A” parts).","Historical/amendment metadata present (Amdt 6; Group \"A\" Parts 3/95) but not explained in this entry."],"plain_english_summary":"The entry cancels airworthiness directive AD/RB211/4 for Rolls‑Royce RB211 Group A engines. Owners, operators and maintainers who relied on that AD must instead follow AD/ENG/7 for control of life‑limited turbine components. Practically, affected parties need to update compliance records and maintenance planning to reference AD/ENG/7; failure to notice the cancellation risks non‑compliance with the currently applicable rules."}},"importantCases":[],"_links":{"self":"/api/acts/ad-rb211-4-amdt-6-group-a-parts","history":"/api/acts/ad-rb211-4-amdt-6-group-a-parts/history","analysis":"/api/acts/ad-rb211-4-amdt-6-group-a-parts/analysis","conflicts":"/api/acts/ad-rb211-4-amdt-6-group-a-parts/conflicts","importantCases":"/api/acts/ad-rb211-4-amdt-6-group-a-parts/important-cases","documents":"/api/acts/ad-rb211-4-amdt-6-group-a-parts/documents"}}