{"id":"F2006B08567","name":"AD/CJ610/3 - Stage 2 Turbine Wheels","slug":"ad-cj610-3-stage-2-turbine-wheels","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51406,"registerId":"commonwealth-F2006B08567-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CJ610/3 - 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 - CJ610 Series\n\n \n\nAD/CJ610/3 Stage 2 Turbine Wheels 9/85\n\nApplicability: All CJ610-1, -4, -5 and -6 engine models fitted with P/N 646C596P1 stage 2 turbine wheels.\n\n \n\nDocument: 1. General Electric Alert SB (CJ610) A72-80 Addendum No. 1; or 2. FAA AD 73-23-5; or\n\nAD/GE-T/28\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","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused on a specific engine component. It has not expanded beyond its original purpose of addressing the Stage 2 turbine wheel safety issue in CJ610 engines. The scope remains tightly constrained to the specific part number and engine models originally identified."},"complexity_factors":["Extremely short document (approximately 200 words)","Only one defined applicability criterion (engine models and part number)","No nested conditional logic or exceptions","Single cross-reference to external technical documents (GE Service Bulletin and FAA AD)","No interpretation section or defined terms","Straightforward compliance requirement ('As detailed in the requirement document')","Technical content is contained entirely in referenced external documents rather than the instrument itself"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA). It mandates safety actions for specific jet engines used in aircraft.\n\n**What it does:**\n- Requires owners and operators of certain **General Electric CJ610 series turbine engines** to inspect or replace **Stage 2 turbine wheels** (a critical rotating component in the engine's hot section).\n- The affected part number is **P/N 646C596P1**.\n\n**Who it affects:**\n- Anyone operating aircraft with **CJ610-1, -4, -5, or -6** engine models fitted with the specified turbine wheels.\n- This includes commercial operators, private owners, and maintenance organisations responsible for these engines.\n\n**Why it matters:**\n- Turbine wheels spin at extreme speeds and temperatures. If they fail, the engine can destroy itself and potentially damage the aircraft or cause a crash.\n- This directive likely addresses a known defect, fatigue issue, or failure mode discovered in these components.\n- Compliance is **mandatory** — you cannot legally fly the aircraft until the required inspection or replacement is done according to the referenced documents (General Electric Alert Service Bulletin or the equivalent FAA directive).\n\n**Key point:** This isn't a law passed by Parliament in the traditional sense. It's a regulatory safety order issued under the **Civil Aviation Regulations 1998**, using powers given to CASA to enforce aircraft airworthiness standards."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The supplied AD text does not indicate any change to scope compared to an original issuance; it plainly states applicability to the listed CJ610 models fitted with P/N 646C596P1 stage 2 turbine wheels and requires compliance with the specified external documents (Applicability; Document; Compliance). No amendments, expansions, or narrowing of affected models or parts are stated in the provided text."},"complexity_factors":["Narrow technical applicability limited to CJ610-1, -4, -5 and -6 engines fitted with P/N 646C596P1 stage 2 turbine wheels (Applicability).","Directive delegates all operational detail to external technical documents rather than specifying measures in the AD text (Document; Compliance).","Multiple alternative referenced documents are listed (three options), requiring operators to identify and obtain the correct document (Document).","Absence of in-text timeframes, inspection intervals, or procedures increases practical complexity for compliance planning (Compliance).","Subject matter is technical (turbine wheel inspection/repair/replacement) and therefore requires specialist maintenance expertise to implement (Applicability; Document).","Regulatory provenance: issued under Civil Aviation Regulations Part 39 - 106, requiring operators to interpret regulatory obligation together with technical guidance (header; Document)."],"plain_english_summary":"This AD applies to GE CJ610‑1/‑4/‑5/‑6 engines fitted with stage‑2 turbine wheel P/N 646C596P1 and requires affected operators to comply with the actions set out in one of the referenced technical documents (GE Alert SB A72‑80 Addendum No.1; FAA AD 73‑23‑5; or AD/GE‑T/28).\n\nIt matters because the regulator mandates compliance by reference: operators/owners must obtain and follow the listed documents, bearing the inspection/repair costs and scheduling impacts, while maintenance providers supply the required work."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cj610-3-stage-2-turbine-wheels","history":"/api/acts/ad-cj610-3-stage-2-turbine-wheels/history","analysis":"/api/acts/ad-cj610-3-stage-2-turbine-wheels/analysis","conflicts":"/api/acts/ad-cj610-3-stage-2-turbine-wheels/conflicts","importantCases":"/api/acts/ad-cj610-3-stage-2-turbine-wheels/important-cases","documents":"/api/acts/ad-cj610-3-stage-2-turbine-wheels/documents"}}