{"id":"F2006B10244","name":"AD/GAZELLE/25 Amdt 1 - Main Rotor and Tail Rotor Dynamic Components","slug":"ad-gazelle-25-amdt-1-main-rotor-and-tail-rotor-dynamic-components","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55912,"registerId":"commonwealth-F2006B10244-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GAZELLE/25 Amdt 1 - Main Rotor and Tail Rotor Dynamic Components","content":"![](image.001.png)\n\nAIRWORTHINESS DIRECTIVE\n\n![](image.001.png)  \n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/GAZELLE/25 and issues the following AD under subregulation 39.1 (1) of CASR 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.\n\n![](image.001.png)  \n\nEurocopter SA341 and SA342 (Gazelle) Series Helicopters\n\nAD/GAZELLE/25\n\nAmdt 1\n\n  \n\nMain Rotor and Tail Rotor Dynamic Components\n\n  \n10/2003\n\nApplicability: Model SA 341G and SA 342 J helicopters, equipped with dynamic components following overhaul (RG) or repair (RE) at the Eurocopter Helicopter Maintenance and Overhaul Facility (D.E.R.H.), listed in Tables 1 and 2 (as applicable) of paragraph 4 “Appendix” of Eurocopter Alert Service Bulletin No. 65.60.\n\nRequirement: 1. Using the Equipment Log Cards (FMEs) of the dynamic components, check whether the dynamic components embody parts affected by this Directive, in accordance with the instructions specified in paragraph 2.B.1. of Alert Service Bulletin No. 65.60.\n\nIf the Requirement 1 check does not reveal the existence of a part affected by this Directive, no further action is required.\n\nIf the check reveals the existence of one or more part(s) affected, comply with the instructions specified in paragraph 2.B.2 of Alert Service Bulletin No. 65.60.\n\n2. After correction in accordance with paragraph 2.B.2.1 of Alert Service Bulletin No. 65.60, if the number of operating hours of a part exceeds its life limit, remove the part concerned or the assembly that embodies the part in accordance with the instructions specified in paragraph 2.B.2.2. of Alert Service Bulletin No. 65.60.\n\nComply with paragraph 2.B. of Alert Service Bulletin No. 65.60 on dynamic components that have been stored following repair or overhaul, before installation on aircraft.\n\nNote: DGAC AD 2002-452(A) R1 refers.\n\nCompliance: 1. Within 10 flight hours after 11 September 2002, unless already accomplished.\n\n2. If affected, within 50 flight hours following determination that the life limit has been exceeded.\n\nThe compliance times of this Directive remain unchanged by this issue. This Amendment becomes effective on 2 October 2003.\n\nEurocopter SA341 and SA342 (Gazelle) Series Helicopters\n\nAD/GAZELLE/25 Amdt 1 (continued)\n\nBackground: A discrepancy in the D.E.R.H. computer system, which is used to carry over the number of operating hours of the parts following repair or overhaul work, is the cause of incorrect completion of some Equipment Log Cards. The result of this discrepancy is that a part that has changed part number or serial number following repair or modification, may have been dispatched with incorrect operating hours. Affected items will show zero hours on their FME.\n\nAmendment 1 is issued in response to a revision of the related DGAC AD, which introduces Alert Service Bulletins in place of the previously referenced Alert Telexes, with no change in technical content.\n\nThe original issue of this Airworthiness Directive became effective on 11 September 2002.\n\n![Signature of David Villiers](image.002.png)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 1 August 2003\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 10 September 2003.","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":4,"scope_assessment":{"changed":false,"description":"Amendment 1 replaces earlier references to Alert Telexes with Alert Service Bulletins and updates the document references; the AD states there is no change in technical content and compliance times remain unchanged (Background). The applicability, required checks, and compliance windows remain as originally issued."},"complexity_factors":["Cross-reference to external manufacturer document (Eurocopter Alert Service Bulletin No. 65.60) for identification and corrective steps (Requirement, Appendix).","Dependence on accuracy and availability of Equipment Log Cards (FMEs) because incorrect hours may be shown due to D.E.R.H. computer discrepancy (Background).","Narrow applicability: only SA341G and SA342J helicopters and only dynamic components overhauled/repaired at D.E.R.H. listed in the bulletin tables (Applicability).","Variable required action depending on check outcome (no action if unaffected; follow bulletin if affected), introducing conditional compliance paths (Requirement).","Life‑limit determinations can trigger removal of parts or assemblies and require operators to verify operating hours and assemblies per bulletin instructions (Requirement 2).","Time‑sensitive compliance windows (10 flight hours for initial check; 50 flight hours to remove parts exceeding limits) which affect maintenance scheduling (Compliance).","Obligation to check stored components before installation adds pre-installation administrative burden (Requirement, last paragraph).","Reference to a foreign authority AD (DGAC AD 2002-452(A) R1) increases traceability requirements for operators and maintainers (Note)."],"plain_english_summary":"This Airworthiness Directive requires operators of Eurocopter SA341G and SA342J (Gazelle) helicopters to check equipment log cards for main- and tail-rotor dynamic components overhauled or repaired at the Eurocopter D.E.R.H. facility, using Eurocopter Alert Service Bulletin No. 65.60. If affected parts are found, operators must follow the bulletin’s instructions and remove parts that have exceeded their life limits. CASA issued the AD under CASR subreg. 39.1(1); the initial check must be done within 10 flight hours and removal within 50 flight hours, so operators pay inspection and replacement costs."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This is a straightforward amendment that updates document references (changing from Alert Telexes to Alert Service Bulletins) without altering the technical requirements or expanding the scope beyond the original safety issue. The amendment explicitly states 'no change in technical content' and maintains the same compliance times."},"complexity_factors":["Multiple cross-references to external documents (Eurocopter Alert Service Bulletin No. 65.60, DGAC AD 2002-452(A) R1) that contain the actual technical instructions","Conditional logic structure: 'If check reveals X, do Y; if not, stop'","Nested compliance timelines (10 hours for initial check, 50 hours for replacement if life limit exceeded)","Specific applicability criteria requiring verification of overhaul facility (D.E.R.H.) and model variants","Amendment structure requires understanding relationship between original AD and Amendment 1"],"plain_english_summary":"This AD revokes and replaces the earlier Gazelle order, addressing a record-keeping error at Eurocopter’s D.E.R.H. facility that left some main and tail rotor components labelled with incorrect “zero” flight hours. It requires operators of SA341/SA342 Gazelles with parts overhauled there to check equipment log cards, follow Eurocopter repair instructions, and remove/replace any component found beyond its life limit (within 50 flight hours). It prevents use of over‑aged parts that could cause rotor failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-gazelle-25-amdt-1-main-rotor-and-tail-rotor-dynamic-components","history":"/api/acts/ad-gazelle-25-amdt-1-main-rotor-and-tail-rotor-dynamic-components/history","analysis":"/api/acts/ad-gazelle-25-amdt-1-main-rotor-and-tail-rotor-dynamic-components/analysis","conflicts":"/api/acts/ad-gazelle-25-amdt-1-main-rotor-and-tail-rotor-dynamic-components/conflicts","importantCases":"/api/acts/ad-gazelle-25-amdt-1-main-rotor-and-tail-rotor-dynamic-components/important-cases","documents":"/api/acts/ad-gazelle-25-amdt-1-main-rotor-and-tail-rotor-dynamic-components/documents"}}