{"id":"F2006B02458","name":"AD/ARRIUS/3 - Fuel Control Unit","slug":"ad-arrius-3-fuel-control-unit","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41714,"registerId":"commonwealth-F2006B02458-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/ARRIUS/3 Fuel Control Unit 2/2001","sectionType":"part","heading":"AD/ARRIUS/3 Fuel Control Unit 2/2001","content":"# AD/ARRIUS/3 Fuel Control Unit 2/2001\n\nApplicability: Arrius 2F turboshaft engines incorporating a fuel control unit (FCU) listed in Turbomeca Alert Service Bulletin A319 73 4808, Issue 1.\n\nRequirement: Rework the FCU maximum fuel flow stop in accordance with Turbomeca Alert Service Bulletin A319 73 4808, Issue 1 or any subsequent issue.\n\nNote: DGAC AD 2000-482 (A) refers.\n\nCompliance: Prior to 30 April 2001.\n\nThis Airworthiness Directive becomes effective on 22 February 2001.\n\nBackground: This Directive has been issued to require an adjustment of the FCU. The requirement follows advice of a fuel flow limitation being identified during an FCU repair. A fuel flow limitation may prevent maximum certificated engine power being available.\n\n![](image.003.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 16 January 2001\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 24 January 2001.","sortOrder":1}],"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":2,"scope_assessment":{"changed":false,"description":"The AD implements the stated objective in the Background: adjust the FCU to correct a fuel-flow limitation identified during repair. Applicability is limited to Arrius 2F engines with FCUs listed in the referenced Turbomeca Alert Service Bulletin, and the directive prescribes the manufacturer’s rework procedure with a fixed compliance date, so it does not broaden or change scope beyond that intent (Background; Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow applicability — only Arrius 2F engines with FCUs listed in Turbomeca Alert Service Bulletin A319 73 4808 are affected (Applicability).","Single required action — a specific rework of the FCU maximum fuel flow stop as described in the Turbomeca Alert Service Bulletin (Requirement).","Fixed compliance deadline — a concrete date by which work must be done (Prior to 30 April 2001) (Compliance).","Technical execution — work requires maintenance skill and access to the manufacturer’s service instructions (Requirement; reference to Turbomeca service bulletin).","Operational impact risk — failure to comply may leave engines unable to deliver maximum certificated power (Background), creating potential operational/performance costs for operators.","Low regulatory discretion — directive prescribes action and cites the service bulletin, leaving little room for alternative corrective measures (Requirement)."],"plain_english_summary":"This Airworthiness Directive requires operators of Arrius 2F turboshaft engines fitted with the fuel control units listed in Turbomeca Alert Service Bulletin A319 73 4808 to have the FCU maximum fuel-flow stop reworked per that service bulletin before 30 April 2001. It is issued by a CASA delegate to address a fuel-flow limitation found during an FCU repair that could prevent the engine reaching maximum certificated power. Engine owners/operators must arrange the specified maintenance by the compliance date."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific technical defect in a specific engine component. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, clearly defined applicability (one engine type with specific FCU)","One straightforward requirement referencing an external technical standard","Simple compliance deadline (single date, no conditional triggers)","No defined terms section — uses plain technical language","No nested exceptions or conditional logic","Short document (under 300 words)","Single cross-reference to French aviation authority (DGAC) and manufacturer service bulletin"],"plain_english_summary":"This AD requires owners/operators of Arrius 2F turboshaft engines with FCUs listed in Turbomeca SB A319 73 4808 to rework the FCU “maximum fuel flow stop” per the manufacturer’s instructions to remove a fuel-flow limitation that can prevent full power. Effective 22 Feb 2001; compliance required before 30 Apr 2001. It prevents loss of required engine power in emergency maneuvers—noncompliance grounds the aircraft under CASA enforcement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-arrius-3-fuel-control-unit","history":"/api/acts/ad-arrius-3-fuel-control-unit/history","analysis":"/api/acts/ad-arrius-3-fuel-control-unit/analysis","conflicts":"/api/acts/ad-arrius-3-fuel-control-unit/conflicts","importantCases":"/api/acts/ad-arrius-3-fuel-control-unit/important-cases","documents":"/api/acts/ad-arrius-3-fuel-control-unit/documents"}}