{"id":"F2006B08509","name":"AD/CF700/5 - Stage 2 Turbine Wheels","slug":"ad-cf700-5-stage-2-turbine-wheels","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51233,"registerId":"commonwealth-F2006B08509-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CF700/5 - Stage 2 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/CF700/5  Stage 2 Turbine Wheels 9/85 Applicability:              All CF700-2C engines fitted with Stage 2 turbine wheels P/N 646 C596P. Document:               General Electric SB (CF700) A72-80; or\n\nAD/GE-T/13.\n\n \n\nCompliance: As detailed in the requirement document.\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":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific known defect in a specific engine component. It has not expanded beyond its original purpose of ensuring airworthiness of CF700-2C engines with the identified part number."},"complexity_factors":["Extremely short document — only 8 substantive lines of regulatory text","No defined terms section — relies entirely on external technical references","Simple conditional structure: single applicability criterion (engine model + part number)","No nested exceptions or conditional logic","Cross-references only to external technical documents (Service Bulletin and another AD), not to other legislative provisions","No penalty provisions, enforcement mechanisms, or administrative procedures contained within the text itself"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of specific aircraft engines to take corrective action regarding **Stage 2 turbine wheels** (a critical rotating component in jet engines that extracts energy from hot gases to power the engine).\n\n**Who it affects:** Anyone operating aircraft with **General Electric CF700-2C engines** that have **Stage 2 turbine wheels with part number 646 C596P** installed.\n\n**What must be done:** Operators must follow the instructions in one of two documents:\n- **General Electric Service Bulletin (CF700) A72-80** — a manufacturer's technical notice describing inspection, repair, or replacement procedures; or\n- **AD/GE-T/13** — another airworthiness directive that presumably addresses the same safety issue.\n\n**Why it matters:** Turbine wheels spin at extremely high speeds and temperatures. If they fail, the engine can destroy itself and potentially damage the aircraft. This AD ensures potentially defective or worn components are identified and fixed before they cause catastrophic failure.\n\n**Compliance:** Operators must follow the timing and procedures exactly as specified in the referenced documents — there's no flexibility here."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument as provided sets a specific, narrow scope: all CF700-2C engines fitted with Stage 2 turbine wheels P/N 646 C596P must comply with the requirements in the referenced documents. The text does not indicate any change to that scope from an earlier or alternative intent."},"complexity_factors":["Narrow technical applicability limited to CF700-2C engines with a single part number (reduces breadth of application)","Technical compliance steps are not in the AD itself but are contained in external documents (GE SB A72-80 or AD/GE-T/13), requiring cross-referencing","Regulatory language is concise and delegatory (\"As detailed in the requirement document\"), leaving procedural detail to third-party material","Compliance burden lies with operators and maintenance organisations (administrative and technical tasks to obtain and implement the referenced documents)","Low legal ambiguity about who is covered, but operational ambiguity about the precise actions until the referenced documents are consulted"],"plain_english_summary":"This Airworthiness Directive mandates that CF700-2C engines fitted with Stage 2 turbine wheel P/N 646 C596P comply with the inspections/repairs set out in GE Service Bulletin A72-80 or AD/GE-T/13.  \n\nAffected aircraft owners/operators must obtain the referenced documents, carry out the required actions and bear associated parts, labour and downtime costs to demonstrate compliance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cf700-5-stage-2-turbine-wheels","history":"/api/acts/ad-cf700-5-stage-2-turbine-wheels/history","analysis":"/api/acts/ad-cf700-5-stage-2-turbine-wheels/analysis","conflicts":"/api/acts/ad-cf700-5-stage-2-turbine-wheels/conflicts","importantCases":"/api/acts/ad-cf700-5-stage-2-turbine-wheels/important-cases","documents":"/api/acts/ad-cf700-5-stage-2-turbine-wheels/documents"}}