{"id":"F2010L02680","name":"AD/CF34/20 - Critical Time Limited Parts","slug":"ad-cf34-20-critical-time-limited-parts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":84637,"registerId":"commonwealth-F2010L02680-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"General Electric Turbine Engines - CF34 ","sectionType":"division","heading":"General Electric Turbine Engines - CF34 Series","content":"### General Electric Turbine Engines - CF34 Series\n\n| AD/CF34/20 | Critical Time Limited Parts | 20/2010 |\n| ---------- | --------------------------- | ------- |\n\n| Applicability: | General Electric Company CF34-8C1 turbofan engines.                                                                                                             |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Unless already accomplished, action in accordance with the requirements of FAA AD 2002-23-02.                                                                   |\n| Compliance:    | As specified in the Requirement Document with a revised effective date of31 October 2010.                                                                       |\n|                | This Airworthiness Directive becomes effective on 31 October 2010.                                                                                              |\n| Background:    | This AD is issued to prevent critical life limited rotating engine part failure which could result in an uncontained engine failure and damage to the aircraft. |\n\n![](image.001.png)  \n  \nMike Higgins  \nDelegate of the Civil Aviation Safety Authority\n\n5 October 2010","sortOrder":0},{"sectionNumber":"AD/CF34/20","sectionType":"part","heading":"AD/CF34/20","content":"## AD/CF34/20","sortOrder":1},{"sectionNumber":"Critical Time Limited Parts","sectionType":"part","heading":"Critical Time Limited Parts","content":"## Critical Time Limited Parts","sortOrder":2},{"sectionNumber":"20/2010","sectionType":"part","heading":"20/2010","content":"## 20/2010","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive adopts and enforces the FAA AD 2002-23-02 requirements for CF34-8C1 engines within domestic regulation and sets a domestic effective date (31 October 2010). It does not expand applicability beyond CF34-8C1 engines or add new categories of parts; it implements the external FAA requirements rather than changing their substantive scope."},"complexity_factors":["Cross-reference to an external instrument (FAA AD 2002-23-02) — compliance depends on requirements outside this document, increasing reliance and coordination.","Technical subject matter: critical, life‑limited rotating engine parts require specialist maintenance, parts tracking and technical judgement.","Compliance mechanism: actions required 'as specified in the Requirement Document' with a revised effective date, creating an additional layer to consult.","Narrow applicability: applies only to GE CF34-8C1 engines, concentrating obligations on a small, identifiable group of operators.","Safety-critical enforcement: noncompliance risks uncontained engine failure, raising high regulatory and operational stakes.","Operational burden: inspections/replacements impose direct costs, scheduling impacts and possible aircraft downtime for operators.","Limited textual detail: the directive mandates FAA AD actions but does not itself list the technical steps, requiring operators to obtain and interpret the FAA document."],"plain_english_summary":"This Airworthiness Directive requires operators of General Electric CF34-8C1 turbofan engines to follow the actions set out in FAA AD 2002-23-02 for critical time‑limited rotating parts, with compliance set out in the Requirement Document and an effective date of 31 October 2010. It is intended to prevent failure of life‑limited rotating parts that could cause an uncontained engine failure and aircraft damage. Practically, engine owners/operators and approved maintenance organisations must carry out the inspections, replacements or other actions specified and bear the associated costs and scheduling burdens."},"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":false,"description":"This is a standard airworthiness directive with narrow, targeted scope. It addresses a specific safety issue (life-limited rotating parts) for a specific engine model. There is no evidence of scope creep; the document precisely matches its original safety purpose."},"complexity_factors":["Extremely short document (under 200 words of substantive content)","Only one defined applicability (single engine model: CF34-8C1)","Single requirement: comply with external FAA directive (FAA AD 2002-23-02)","No nested conditions, exceptions, or alternative compliance methods","No internal definitions section — relies entirely on external document","Simple binary compliance structure: 'unless already accomplished, do X'"],"plain_english_summary":"This CASA Airworthiness Directive mandates operators of General Electric CF34-8C1 engines (e.g., on Bombardier CRJ-type aircraft) to comply with FAA AD 2002-23-02 by 31 October 2010, requiring inspection or replacement of specified time‑limited parts. It matters because exceeded part limits risk uncontained engine failure with serious safety consequences."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cf34-20-critical-time-limited-parts","history":"/api/acts/ad-cf34-20-critical-time-limited-parts/history","analysis":"/api/acts/ad-cf34-20-critical-time-limited-parts/analysis","conflicts":"/api/acts/ad-cf34-20-critical-time-limited-parts/conflicts","importantCases":"/api/acts/ad-cf34-20-critical-time-limited-parts/important-cases","documents":"/api/acts/ad-cf34-20-critical-time-limited-parts/documents"}}