{"id":"F2006B07716","name":"Airworthiness Directives 2004 - Revocation and Remaking - AlliedSignal (Garrett/AiResearch) Turbine Engines - ATF3 Series","slug":"airworthiness-directives-2004-revocation-and-remaking-alliedsignal-garrett-airesearch-turbine-engine","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50448,"registerId":"commonwealth-F2006B07716-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Airworthiness Directives 2004 - Revocation and Remaking - AlliedSignal (Garrett/AiResearch) Turbine Engines - ATF3 Series","content":"Airworthiness Directives 2004\n\nI, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety\n\nAuthority, acting under subregulation 39.001 (1) of the Civil\n\nAviation Safety Regulations 1998:\n\n(a) revoke the Airworthiness Directives mentioned in\n\nSchedule 1; and\n\n(b) make, as separate instruments, each Airworthiness\n\nDirective mentioned in Schedule 1 and attached.\n\n![](image.001.png)\n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority\n\n20 December 2004\n\nNote: Each attached Airworthiness Directive is being re-made in exactly the\n\nsame form as appears in the latest published edition of the Directive.\n\n  \nSchedule 1 Revocation and Remaking of\n\nAirworthiness Directives\n\n[AlliedSignal (Garrett/AiResearch) Turbine Engines - ATF3 Series](http://www.casa.gov.au/airworth/airwd/schedules/ad_display.asp?sched=turbine&toc=Atf3)\n\nAD Name AD Number\n\nRotating Components - Service Life Limits - CANCELLED AD/ATF3/1 Amdt 1\n\nExhaust Splitter Seal Bolted Flange System AD/ATF3/2\n\nH.P. Turbine Rotor Assembly P/No. 3001766-7 AD/ATF3/3\n\nHigh Pressure Turbine Disc Inspection AD/ATF3/4","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument explicitly states it is remaking the Airworthiness Directives 'in exactly the same form as appears in the latest published edition.' This is purely procedural — updating the legal instrument type without expanding or altering the substantive safety requirements."},"complexity_factors":["Very short instrument (under 500 words)","Only 4 substantive items in Schedule 1","No defined terms section","No nested conditional logic or exceptions","Single clear operative provision with two straightforward actions (revoke and remake)","Cross-reference only to enabling regulation (subregulation 39.001(1)) and the Schedule itself","Note clarifies no substantive change to content"],"plain_english_summary":"This is an official aviation safety instrument issued by the Civil Aviation Safety Authority (CASA) in December 2004. It does two things: **cancels (revokes) four old Airworthiness Directives** that applied to specific AlliedSignal (Garrett/AiResearch) ATF3 series turbine engines, and **immediately remakes them as new, separate legal instruments** in exactly the same form as they previously existed.\n\n**Who it affects:**\n- Owners and operators of aircraft using AlliedSignal (Garrett/AiResearch) ATF3 series turbine engines\n- Aircraft maintenance engineers and organisations\n- CASA itself (as the regulator)\n\n**Why it matters:**\nAirworthiness Directives are **legally binding safety orders** that require specific inspections, repairs, or modifications to aircraft engines to prevent accidents. This instrument ensures these safety requirements remain in force while updating their legal status. The four directives cover:\n- **AD/ATF3/1 Amdt 1**: Service life limits for rotating components (notably marked as \"CANCELLED\" — this one was being revoked without remaking)\n- **AD/ATF3/2**: Issues with the exhaust splitter seal bolted flange system\n- **AD/ATF3/3**: Specific high-pressure turbine rotor assembly part number\n- **AD/ATF3/4**: Inspection requirements for high-pressure turbine discs\n\nThis is essentially **administrative housekeeping** — updating the legal form of existing safety rules without changing their substance."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope is not changed. The instrument expressly revokes the listed ADs and re-makes them in the same form as the latest published editions (see Schedule 1 and accompanying note), so substantive obligations, affected equipment (ATF3-series engines) and compliance duties remain unchanged."},"complexity_factors":["Administrative procedure only: revocation and re-issuance without substantive change (note: attached ADs are \"exactly the same form\" as latest published edition).","References multiple existing ADs (four listed in Schedule 1), requiring recipients to track each instrument.","Legal authority reliance on subregulation 39.001(1) — a technical procedural power rather than a policy change.","Compliance burden remains on operators/maintenance organisations (inspections, life limits, repairs) even though text unchanged.","Dependence on externally published AD texts for operative detail creates cross-document dependency and potential for versioning confusion."],"plain_english_summary":"*Revokes and re-makes* listed Airworthiness Directives for AlliedSignal (Garrett/AiResearch) ATF3-series turbine engines, issuing each as a separate, identical instrument (delegate acting under subregulation 39.001(1)).\n\nThis changes the legal form of the ADs but not their substance: aircraft owners, operators and maintenance organisations who operate ATF3 engines remain responsible for meeting the same inspections, life limits and repair requirements, and therefore for associated compliance costs."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-alliedsignal-garrett-airesearch-turbine-engine","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-alliedsignal-garrett-airesearch-turbine-engine/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-alliedsignal-garrett-airesearch-turbine-engine/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-alliedsignal-garrett-airesearch-turbine-engine/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-alliedsignal-garrett-airesearch-turbine-engine/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-alliedsignal-garrett-airesearch-turbine-engine/documents"}}