{"id":"F2006L01422","name":"AD/ARRIEL/23 Amdt 1 - Start Electro Valve - Fuel Leaks","slug":"ad-arriel-23-amdt-1-start-electro-valve-fuel-leaks","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":59031,"registerId":"commonwealth-F2006L01422-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Turbomeca Turbine Engines - Arriel Serie","sectionType":"division","heading":"Turbomeca Turbine Engines - Arriel Series","content":"### Turbomeca Turbine Engines - Arriel Series\n\n| AD/ARRIEL/23 Amdt 1 | Start Electro Valve - Fuel Leaks | 7/2006 DM |\n| ------------------- | -------------------------------- | --------- |\n\n| Applicability: | TURBOMECA Arriel 1 Series Turbo shaft engines.                                                                                                                                                                                                                                                                                                                                                                           |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Inspect for looseness on the tee coupling on the start electro valve and ensure correct and proper assembly in accordance with Turbomeca alert service bulletin (ASB) number A292 73 0251 revision 2 dated 05 February 2001 or later approved revisions.Note: EASA Airworthiness Directive (AD) No 2006-0068 dated 24 March 2006 refers.                                                                                 |\n| Compliance:    | With in one month, after the effective date of this AD, unless accomplished earlier.                                                                                                                                                                                                                                                                                                                                     |\n|                | This Amendment becomes effective on 8 June 2006.                                                                                                                                                                                                                                                                                                                                                                         |\n| Background:    | During engine operations, fuel leaks at the level of start electro valve fuel coupling were observed. These fuel leaks may result in fire or a lack of power or an uncommanded in-flight shutdown.The current amendment corrects typographical error noted in the original issue of this Airworthiness Directive. The technical contents remain unchanged.The original issue of this AD became effective on 8 June 2006. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n4 May 2006","sortOrder":0},{"sectionNumber":"AD/ARRIEL/23 Amdt 1","sectionType":"part","heading":"AD/ARRIEL/23 Amdt 1","content":"## AD/ARRIEL/23 Amdt 1","sortOrder":1},{"sectionNumber":"Start Electro Valve - Fuel Leaks","sectionType":"part","heading":"Start Electro Valve - Fuel Leaks","content":"## Start Electro Valve - Fuel Leaks","sortOrder":2},{"sectionNumber":"7/2006 DM","sectionType":"part","heading":"7/2006 DM","content":"## 7/2006 DM","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a minor administrative amendment correcting a typographical error in the original Airworthiness Directive. The technical content, safety requirements, and scope remain identical to the original AD/ARRIEL/23. The document explicitly states: 'The technical contents remain unchanged.'"},"complexity_factors":["Very short document (approximately 200 words)","Only 1 defined term implicitly referenced (ASB - Alert Service Bulletin)","Single, straightforward compliance requirement with no exceptions or conditional logic","No cross-references to other legislation or complex procedural steps","Clear, unambiguous applicability statement targeting specific engine model","Simple timeline: one month from effective date"],"plain_english_summary":"This Airworthiness Directive orders operators and maintenance organisations of Turbomeca Arriel 1 turboshaft engines to inspect the start electro valve’s tee coupling and correct any loose or incorrect assembly to stop observed fuel leaks. The hazard is engine fire, power loss or in‑flight shutdown; compliance is required within one month of the AD’s effective date. This document merely amends a prior AD to correct a typographical error—no safety requirements changed."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The amendment corrects a typographical error only; the AD states the technical requirements remain unchanged and the original AD became effective on 8 June 2006 (Background)."},"complexity_factors":["Narrow applicability: limited to Turbomeca Arriel 1 series turboshaft engines (Applicability).","Single, focused action: one inspection and reassembly check rather than a multi‑stage regulatory program (Requirement).","Short compliance window: obliges action within one month of the AD effective date, increasing scheduling pressure (Compliance).","Delegation to manufacturer guidance: technical procedure is defined by Turbomeca ASB A292 73 0251 rev 2 or later, requiring operators to follow an external document (Requirement).","Safety‑critical consequences: failures involve fire or in‑flight shutdown, so enforcement and record‑keeping are likely to be strict (Background).","Amendment is administrative: this instrument corrects a typographical error and states no technical change, reducing substantive complexity (Background).","Effective date specified: operator planning must align with the AD effective date of 8 June 2006 (Compliance)."],"plain_english_summary":"This Airworthiness Directive requires operators of Turbomeca Arriel 1 series turboshaft engines to inspect the tee coupling at the start electro valve for looseness and to ensure correct assembly, following Turbomeca Alert Service Bulletin A292 73 0251 (rev 2 or later), within one month of the AD becoming effective. The stated purpose is to address observed fuel leaks that could cause fire, power loss or uncommanded in‑flight shutdown. Compliance costs and actions fall to engine operators; the AD relies on the manufacturer’s ASB for the technical procedure."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-arriel-23-amdt-1-start-electro-valve-fuel-leaks","history":"/api/acts/ad-arriel-23-amdt-1-start-electro-valve-fuel-leaks/history","analysis":"/api/acts/ad-arriel-23-amdt-1-start-electro-valve-fuel-leaks/analysis","conflicts":"/api/acts/ad-arriel-23-amdt-1-start-electro-valve-fuel-leaks/conflicts","importantCases":"/api/acts/ad-arriel-23-amdt-1-start-electro-valve-fuel-leaks/important-cases","documents":"/api/acts/ad-arriel-23-amdt-1-start-electro-valve-fuel-leaks/documents"}}