{"id":"F2006B08764","name":"AD/DAUPHIN/52 - Main Rotor Blade Life Limits","slug":"ad-dauphin-52-main-rotor-blade-life-limits","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52043,"registerId":"commonwealth-F2006B08764-current","compilationNumber":null,"startDate":"2026-04-02","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/DAUPHIN/52 Main Rotor Blade Life Limi","sectionType":"part","heading":"AD/DAUPHIN/52 Main Rotor Blade Life Limits 9/2000","content":"# AD/DAUPHIN/52 Main Rotor Blade Life Limits 9/2000\n\nApplicability: SA 365 models C, C1, C2 and C3. Requirement: Remove from service main rotor blades:\n\n    P/N 365A 11.0010.03 before attaining 10 000 hours time in service; and\n\n    b. P/N 365A 11.0020.02 and .03 before attaining 12 000 hours time in service.\n\nNote: DGAC AD 2000-235-045(A) refers.\n\nCompliance: From the effective date of this directive.\n\nThis Airworthiness Directive becomes effective on 7 September 2000.\n\nBackground: This directive is to limit the life of certain main rotor blades.\n\n![Signature of David Alan Villiers Delegate of the Civil Aviation Safety Authority](image.003.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 20 July 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 9 August 2000.","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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused specifically on rotor blade life limits for particular Dauphin helicopter models. It has not expanded beyond its original purpose; it does exactly what the title and background state — limits the service life of specific main rotor blades."},"complexity_factors":["Very short document (approximately 200 words)","Only 2 defined part numbers with specific hour limits","Single applicability criterion (4 specific helicopter models)","No cross-references to other legislation beyond a single note referencing a French aviation directive (DGAC AD 2000-235-045(A))","No conditional logic or exceptions — straightforward 'remove before X hours' requirement","No interpretation section or defined terms","Clear, single compliance date with no phased implementation"],"plain_english_summary":"This Airworthiness Directive requires mandatory retirement of specified main rotor blades on Eurocopter Dauphin SA 365 (C/C1/C2/C3) helicopters—PN 365A 11.0010.03 before 10,000 flight hours, and PN 365A 11.0020.02/.03 before 12,000 hours.  \n\nIt's a preventive safety order (effective 7 September 2000) to reduce catastrophic risk from metal fatigue and applies to owners/operators; flying with blades past these limits is a legal violation."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's requirements align with its stated background purpose to limit blade life for the listed part numbers. The instrument imposes explicit life limits and an effective date; the text shows no expansion or narrowing beyond that stated purpose."},"complexity_factors":["Narrow applicability: only SA 365 models C, C1, C2 and C3 (low scope breadth).","Specific, numeric life limits for discrete part numbers (clear compliance targets).","Immediate compliance from the effective date increases operational urgency for affected operators.","Administrative burden: operators must track hours-in-service for individual blades to demonstrate compliance.","Low regulatory discretion: directive mandates removal at thresholds rather than inspection-based discretion.","No technical replacement procedure or alternative compliance path specified in the text (simplicity but potential logistical cost)."],"plain_english_summary":"This directive requires operators of SA 365 models C, C1, C2 and C3 to remove specific main rotor blades before they reach set flight‑hour limits: P/N 365A11.0010.03 at 10,000 hours and P/N 365A11.0020.02/.03 at 12,000 hours. It takes effect 7 September 2000 and was issued by a CASA delegate to limit blade life and address an unsafe condition. Operators must replace blades before those hours, so they bear replacement and scheduling costs and must track blade hours to comply."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dauphin-52-main-rotor-blade-life-limits","history":"/api/acts/ad-dauphin-52-main-rotor-blade-life-limits/history","analysis":"/api/acts/ad-dauphin-52-main-rotor-blade-life-limits/analysis","conflicts":"/api/acts/ad-dauphin-52-main-rotor-blade-life-limits/conflicts","importantCases":"/api/acts/ad-dauphin-52-main-rotor-blade-life-limits/important-cases","documents":"/api/acts/ad-dauphin-52-main-rotor-blade-life-limits/documents"}}