{"id":"F2006B08501","name":"AD/CF700/12 - First And Second Stage Turbine Wheels","slug":"ad-cf700-12-first-and-second-stage-turbine-wheels","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51211,"registerId":"commonwealth-F2006B08501-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CF700/12 - First And Second Stage Turbine Wheels","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)  General Electric Turbine Engines - CF700 Series\n\n \n\nAD/CF700/12 First And Second Stage Turbine Wheels 9/85\n\nApplicability: All CF700-2C.\n\n \n\nDocument: General Electric SBs (CF700) A72-111 and A72-112; or AD/GE-T/25.\n\nCompliance: As detailed in reference documents.\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":false,"description":"The instrument, as provided, states a single, narrow scope: it applies to all CF700-2C engines and requires compliance with specified GE service bulletins or AD/GE-T/25 (Applicability and Document lines). The text contains no language indicating an expansion or narrowing of scope from a prior instrument or an amendment to an existing scope. Therefore there is no indication in this text that the scope has changed from an original intent."},"complexity_factors":["Very narrow applicability (applies only to CF700-2C) as stated in \"Applicability: All CF700-2C.\"","Substantive requirements are deferred to external technical documents (GE SBs A72-111, A72-112, or AD/GE-T/25) rather than included in the AD text (\"Document: ...\" and \"Compliance: As detailed in reference documents.\")","Limited procedural detail in the instrument itself (no timelines, no step-by-step requirements, no enforcement mechanics present in the text)","Regulatory context referenced (Part 39 framework) which may add procedural layers outside the AD text (header)"],"plain_english_summary":"This AD from the Civil Aviation Safety Authority applies to all CF700-2C engines and mandates compliance with the referenced GE service bulletins (A72-111, A72-112) or AD/GE‑T/25. It’s intended to preserve airworthiness of first and second stage turbine wheels and therefore affects operators/owners of CF700-2C‑powered aircraft. The directive delegates technical detail and timing to those referenced documents, so operators will need to obtain and follow them and likely bear compliance costs."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1985 (indicated by '9/85' in the identifier) addressing a specific mechanical component. It has not expanded beyond its original purpose of ensuring turbine wheel integrity in CF700-2C engines. The scope remains tightly constrained to this engine model and these specific rotating components."},"complexity_factors":["Extremely short document — only 8 substantive lines of regulatory text","No defined terms section — relies entirely on external references","Single, unambiguous applicability clause ('All CF700-2C')","No conditional logic or nested exceptions — compliance is absolute and references external technical documents","Cross-references are limited to three specific technical documents (two Service Bulletins and one FAA AD)","No penalty provisions, enforcement mechanisms, or dispute resolution procedures included"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order — issued by Australia's Civil Aviation Safety Authority (CASA) for a specific aircraft engine part.\n\n**What it does:**\n- Requires inspection or replacement of the **first and second stage turbine wheels** in **General Electric CF700-2C jet engines**.\n- These turbine wheels are critical rotating components that extract energy from hot gases to power the engine. If they fail, the engine can break apart catastrophically.\n\n**Who it affects:**\n- Owners and operators of aircraft fitted with **CF700-2C engines** (commonly used in business jets like the Dassault Falcon 10).\n- Maintenance organisations servicing these engines.\n\n**Why it matters:**\n- Turbine wheels operate under extreme stress, heat, and centrifugal force. Material fatigue or manufacturing defects can cause them to crack or burst.\n- This directive mandates compliance with specific General Electric Service Bulletins (SBs A72-111 and A72-112) or an equivalent FAA directive (AD/GE-T/25) to prevent engine failures that could lead to loss of aircraft and life.\n\n**What must be done:**\n- Operators must follow the detailed instructions in the referenced documents — typically involving inspections for cracks, dimensional checks, or replacement of parts that have exceeded safe operating limits."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cf700-12-first-and-second-stage-turbine-wheels","history":"/api/acts/ad-cf700-12-first-and-second-stage-turbine-wheels/history","analysis":"/api/acts/ad-cf700-12-first-and-second-stage-turbine-wheels/analysis","conflicts":"/api/acts/ad-cf700-12-first-and-second-stage-turbine-wheels/conflicts","importantCases":"/api/acts/ad-cf700-12-first-and-second-stage-turbine-wheels/important-cases","documents":"/api/acts/ad-cf700-12-first-and-second-stage-turbine-wheels/documents"}}