{"id":"F2006B07885","name":"Airworthiness Directives 2004 - Revocation and Remaking - General Electric Turbine Engines - CT58 Series","slug":"airworthiness-directives-2004-revocation-and-remaking-general-electric-turbine-engines-ct58-series","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50885,"registerId":"commonwealth-F2006B07885-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 - General Electric Turbine Engines - CT58 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\nGeneral Electric Turbine Engines - CT58 Series\n\nAD Name AD Number\n\nCT58 Series Life Limits - Engine Rotating Parts - CANCELLED AD/CT58/1 Amdt 1\n\nCentrifugal Filter 'T' Bolt AD/CT58/2\n\nCombustion Casing Adapter Boss AD/CT58/3\n\nCompressor Stator Vanes AD/CT58/4\n\nStage 1 and Stage 2 Turbine Wheel AD/CT58/5\n\nCentrifugal Fuel Purifier AD/CT58/6\n\nPower Turbine Wheel AD/CT58/7\n\nDetuner Hose Assembly AD/CT58/8\n\nAnti-Icing Valve AD/CT58/9\n\nAccessory Drive Gearbox - Pinion Gear Bolt Torque AD/CT58/10\n\nOil Cooler to Fuel Filter Hose AD/CT58/11\n\nLube and Scavenge Pump AD/CT58/12\n\nStage 1 Turbine Wheels AD/CT58/13\n\nLead Lag Servo Housing AD/CT58/14\n\nInspection/Replacement of Rotating Parts AD/CT58/15\n\nFuel Flow Divider Assemblies - Replacement AD/CT58/16\n\nStarter Driveshaft Bearing AD/CT58/17\n\nFuel Flow Divider Assemblies AD/CT58/18","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope was not substantively changed: the instrument revokes the listed ADs and re-makes each one in the same form (see Schedule 1 and the note stating each AD is re-made in exactly the same form as the latest published edition)."},"complexity_factors":["Administrative revocation and re-issuance mechanism under subregulation 39.001(1) (instrument relies on existing regulatory power).","Aggregate of multiple directives: Schedule 1 lists 18 separate ADs for the CT58 series.","Each AD is re-made ‘in exactly the same form’ as the latest published edition, reducing substantive legal change but requiring cross-reference to the published AD texts.","Decision is taken by a delegated CASA officer (David Villiers), reflecting delegated administrative authority and signature formalities.","Practical complexity arises from managing transition to separate instruments and ensuring stakeholders reference the correct, re-made AD documents."],"plain_english_summary":"This instrument revokes a set of existing Airworthiness Directives for General Electric CT58 series turbine engines and re-issues each one as a separate, identical instrument. The CASA delegate, David Villiers, acted under subregulation 39.001(1).\n\nIt affects persons subject to the listed ADs because the requirements are preserved but are now standalone instruments; the change is administrative rather than substantive (each AD is re-made in exactly the same form as the latest published edition)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is purely a procedural reorganization. The scope remains identical to the original 2004 Airworthiness Directives — the same 18 technical requirements for the same engine series. The document explicitly states each directive is being remade 'in exactly the same form' with no expansion of coverage or substantive modification."},"complexity_factors":["Very short document (under 2 pages)","Simple binary structure: revoke list + remake list","No defined terms section","No conditional logic or exceptions","Cross-reference only to Civil Aviation Safety Regulations 1998 (single citation)","Schedule 1 is a simple table with 18 rows and 2 columns","No substantive legal drafting — purely procedural/administrative","Note explicitly states directives are remade 'in exactly the same form'"],"plain_english_summary":"This CASA order formally revokes 18 existing Airworthiness Directives for General Electric CT58 turbine engines and immediately remakes them as 18 separate legal instruments with identical content. It’s an administrative re‑formatting—not a safety change—meant to make each directive easier to find, update, and enforce. It affects aircraft owners/operators and maintenance engineers who work on CT58‑equipped helicopters."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-general-electric-turbine-engines-ct58-series","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-general-electric-turbine-engines-ct58-series/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-general-electric-turbine-engines-ct58-series/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-general-electric-turbine-engines-ct58-series/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-general-electric-turbine-engines-ct58-series/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-general-electric-turbine-engines-ct58-series/documents"}}