{"id":"F2006B09563","name":"AD/ENG/7 - Replacement of Life Limited Turbine Engine Components","slug":"ad-eng-7-replacement-of-life-limited-turbine-engine-components","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":54221,"registerId":"commonwealth-F2006B09563-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ENG/7 - Replacement of Life Limited Turbine Engine Components","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)  Engines - General\n\n \n\n# AD/ENG/7 Replacement of Life Limited Turbine Engine Components\n\nApplicability: All aircraft turbine engines.\n\n# 1/95\n\n \n\nRequirement: 1. Unless otherwise directed by the Authority, replace life limited turbine engine components in accordance with the latest issue of the applicable engine manufacturer's service document that details such life limits.\n\n \n\n2. Record the operating hours since new and the operating cycles since new for each life limited component in accordance with the applicable engine manufacturer's document that details component life limits.\n\n \n\nNote: Following publication of this Directive, all Directives specific to an engine type/model that reflect this requirement will ultimately be cancelled.\n\n \n\nCompliance: Effective 5 January 1995.\n\n \n\nBackground: This Directive is issued to provide a single document to regulate engine component lives for both existing and future engine types. Before the issue of this Directive, retirement of life limited engine components was mandated by an individual Directive for each engine type and each of these required frequent amendment as engine service history developed and modification status changed.\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_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The original scope was fragmented — individual directives for each engine type. This version consolidates into a universal directive covering all turbine engines, significantly broadening scope while simplifying administration. The 'Note' confirms this was an intentional consolidation to replace multiple type-specific directives."},"complexity_factors":["Very short document (under 300 words)","Only 2 substantive requirements, clearly numbered","No defined terms section — relies on industry-standard understanding of 'life limited components'","Single cross-reference to manufacturer documents (external, not legislative)","No conditional logic, exceptions, or nested provisions","Straightforward compliance date with no phased implementation"],"plain_english_summary":"This AD requires all Australian turbine-engined aircraft to replace life-limited engine components before they reach manufacturer-established limits and to record each part’s hours and flight cycles since new. It consolidates previous engine-specific directives into a single rule, simplifying compliance and reducing safety gaps. Affects anyone who owns, operates or maintains turbine-powered aircraft in Australia."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Scope was consolidated from multiple engine‑type‑specific Directives to a single, universal Directive covering all turbine engines and future types. The Background explains the intent to replace individual retirement Directives with one standard rule; prior engine‑specific Directives will be cancelled as they are brought into alignment (Background; Note)."},"complexity_factors":["Breadth of application: covers all aircraft turbine engines and future engine types (Applicability; Background).","Dependence on external documents: compliance is tied to the \"latest issue\" of each manufacturer's service document, creating dynamic external references (Requirement 1).","Regulatory discretion: clause \"Unless otherwise directed by the Authority\" permits administrative exceptions or further directions (Requirement 1).","Operational record‑keeping: requirement to record hours‑since‑new and cycles‑since‑new for each life‑limited component imposes ongoing administrative burden on operators (Requirement 2).","Transition and cancellation effects: prior engine/type‑specific Directives will be cancelled as they are superseded, requiring programme alignment and change management (Note; Background).","Enforcement and monitoring: verifying adherence requires access to manufacturers' documents and operators' records, increasing oversight complexity.","Temporal variability risk: manufacturers may amend service documents as service history and modifications evolve, creating recurring compliance updates for operators."],"plain_english_summary":"AD/ENG/7 requires that life‑limited turbine engine components be replaced in line with the latest issue of the applicable engine manufacturer's service document and that operators record hours‑since‑new and cycles‑since‑new for each component (Requirements 1–2). The Directive consolidates prior engine‑specific mandates into one universal rule to standardise retirement limits (Background); it reduces the need to amend many individual Directives but shifts ongoing compliance costs and operational reliance onto operators and manufacturers' published limits."}},"importantCases":[],"_links":{"self":"/api/acts/ad-eng-7-replacement-of-life-limited-turbine-engine-components","history":"/api/acts/ad-eng-7-replacement-of-life-limited-turbine-engine-components/history","analysis":"/api/acts/ad-eng-7-replacement-of-life-limited-turbine-engine-components/analysis","conflicts":"/api/acts/ad-eng-7-replacement-of-life-limited-turbine-engine-components/conflicts","importantCases":"/api/acts/ad-eng-7-replacement-of-life-limited-turbine-engine-components/important-cases","documents":"/api/acts/ad-eng-7-replacement-of-life-limited-turbine-engine-components/documents"}}