{"id":"F2006B02264","name":"AD/AL 250/52 Amdt 1 - Engine Fuel and Control - Bendix Fuel Control Assemblies and Power Turbine Governor Assemblies","slug":"ad-al-250-52-amdt-1-engine-fuel-and-control-bendix-fuel-control-assemblies-and-power-turbine-governo","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41494,"registerId":"commonwealth-F2006B02264-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AL 250/52 Amdt 1 - Engine Fuel and Control - Bendix Fuel Control Assemblies and Power Turbine Governor Assemblies","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 1/1983,Turbine engines,Allison Turbine Engines - 250 Series,Engine Fuel and Control - Bendix Fuel Control Assemblies and Power Turbine Governor Assemblies,52 Amdt 1\ntitle: Airworthiness Directive - AD/AL 250/52 Amdt 1 - Engine Fuel and Control - Bendix Fuel Control Assemblies and Power Turbine Governor Assemblies\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)  Allison Turbine Engines - 250 Series\n\n \n\nAD/AL 250/52\n\nAmdt 1\n\n\nEngine Fuel and Control - Bendix Fuel Control Assemblies and Power Turbine Governor Assemblies\n\n\n1/83\n\n \n\nApplicability: Allison 250 series engines.\n\n \n\nDocument: Allison 250-C18, CEB-A-229.\n\nAllison 250-C20, C20B, C20F, C20J, CB-A-1206. Allison 250-B15G. TP CEB-A-99.\n\nAllison 250-B17, B17B, B17C, TP CEB-A-1166. Allison 250-C28B, C28C. CEB-A-73-2026.\n\nAllison 250-C30, C30P, C30S. CEB-A-73-3021.\n\n \n\nNote: FAA AD Allison 82-24-05 Amendment 39-4498 refers.\n\n \n\nCompliance: In accordance with requirement documents.\n\n \n\nBackground: This amendment is raised to include the above FAA AD 82-24-05 in the AD document reference.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The amendment only adds the FAA AD 82-24-05 to the list of AD document references (Background: 'include the above FAA AD 82-24-05 in the AD document reference'). It does not alter the stated applicability ('Allison 250 series engines') or replace the operative compliance language ('In accordance with requirement documents'), so no new substantive obligations are introduced in the AD text itself."},"complexity_factors":["Administrative amendment only (Background: 'include the above FAA AD 82-24-05 in the AD document reference') — low substantive change.","Broad applicability (Applicability: 'Allison 250 series engines') increases affected parties.","Reliance on external technical documents (multiple Allison CEB documents and FAA AD) requires users to obtain and interpret external material.","Lack of specified actions or deadlines in the text ('Compliance: In accordance with requirement documents') creates dependence on the referenced documents for operative detail.","Potential versioning/interpretation risk where multiple documents and amendments interact (FAA AD referenced without reproducing its requirements).","Enforcement and practical cost allocation reside with operators/maintainers (implied by 'Applicability' and 'Compliance' clauses)."],"plain_english_summary":"This amendment to Airworthiness Directive AD/AL 250/52 adds a cross-reference to FAA AD 82-24-05 in the AD's list of requirement documents. It applies to all Allison 250-series turbine engines and requires operators and maintenance organisations to comply with the listed requirement documents when carrying out fuel-control and power-turbine-governor work. Mechanically, it changes the document references only; the compliance burden—obtaining and following the referenced Allison/FAA documents—falls on engine operators and maintainers, and CASA enforces compliance under Part 39."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a minor administrative amendment to an existing Airworthiness Directive. The original purpose was to mandate safety actions for specific engine components. Amendment 1 simply adds a reference to the corresponding FAA directive (82-24-05) without expanding the scope of affected engines, components, or required actions."},"complexity_factors":["Very short document (approximately 250 words)","Only 2 substantive operative provisions: applicability and compliance","No defined terms section — relies entirely on external technical references","No conditional logic or nested exceptions","Single amendment purpose: adding one FAA AD reference to existing directive","Technical complexity exists in referenced documents (CEBs/TPs), not in the legislative instrument itself"],"plain_english_summary":"CASA’s Airworthiness Directive mandates inspection or servicing of Bendix fuel control and power turbine governor assemblies on Allison 250 series engines, following the referenced technical bulletins. It applies to operators, maintenance organisations and licensed engineers of helicopters and small turboprops using these engines. Mandatory under the Civil Aviation Regulations 1998, the amendment aligns with FAA AD 82‑24‑05 to reduce risks of engine failure, power loss or uncontrolled overspeed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-al-250-52-amdt-1-engine-fuel-and-control-bendix-fuel-control-assemblies-and-power-turbine-governo","history":"/api/acts/ad-al-250-52-amdt-1-engine-fuel-and-control-bendix-fuel-control-assemblies-and-power-turbine-governo/history","analysis":"/api/acts/ad-al-250-52-amdt-1-engine-fuel-and-control-bendix-fuel-control-assemblies-and-power-turbine-governo/analysis","conflicts":"/api/acts/ad-al-250-52-amdt-1-engine-fuel-and-control-bendix-fuel-control-assemblies-and-power-turbine-governo/conflicts","importantCases":"/api/acts/ad-al-250-52-amdt-1-engine-fuel-and-control-bendix-fuel-control-assemblies-and-power-turbine-governo/important-cases","documents":"/api/acts/ad-al-250-52-amdt-1-engine-fuel-and-control-bendix-fuel-control-assemblies-and-power-turbine-governo/documents"}}