{"id":"F2006B02467","name":"AD/ARTOUSTE/6 - Fuel Shutoff Valve - Control","slug":"ad-artouste-6-fuel-shutoff-valve-control","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41723,"registerId":"commonwealth-F2006B02467-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ARTOUSTE/6 - Fuel Shutoff Valve - Control","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\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)  Turbomeca Turbine Engines - Artouste Series\n\n \n\nAD/ARTOUSTE/6 Fuel Shutoff Valve - Control 9/87\n\nApplicability: All Artouste III B-B1-BF & BF1.\n\n \n\nRequirement: Turbomeca SB Artouste 80-218-0083 (Modification TU 153). Compliance: Before 31 December 1987.\n\nBackground: The fuel shutoff valve has been reported partially closing causing engine power loss.\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\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 directive, as written, specifies its original corrective scope: mandate Modification TU 153 per Turbomeca Service Bulletin 80-218-0083 for all Artouste III B/B1/BF/BF1 engines and requires completion before 31 December 1987. There is no indication in the text that the scope was broadened or narrowed from that original remedial intent (Applicability, Requirement, Compliance, Background)."},"complexity_factors":["Narrow technical scope: applies only to specific Turbomeca Artouste III variants (Applicability).","External technical detail: the AD mandates compliance by reference to a manufacturer service bulletin and modification number rather than reproducing procedural steps, so implementers must consult that bulletin for the work required (Requirement).","Fixed compliance deadline: a single mandatory date for completion imposes scheduling constraints on operators and maintenance providers (Compliance).","Safety-critical consequence: the issue concerns fuel shutoff valve behaviour reported to cause engine power loss, which increases urgency and reduces tolerance for delayed compliance (Background).","Limited information in the AD text about exemptions, parts availability or alternative corrective actions — operators bear discretion and practical burdens to achieve compliance (Requirement)."],"plain_english_summary":"This directive mandates that owners/operators of aircraft with Turbomeca Artouste III B, B1, BF and BF1 engines carry out Modification TU 153 as detailed in Turbomeca Service Bulletin Artouste 80-218-0083, to be completed before 31 December 1987. It responds to reports of partial fuel shutoff‑valve closure causing engine power loss.\n\nOperators must arrange and fund the work and use qualified maintenance organisations; the AD sets the requirement and deadline but relies on the service bulletin for technical implementation."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific mechanical defect in specific engine models. It has not expanded beyond its original purpose of mandating a single technical modification."},"complexity_factors":["Very short document (approximately 150 words)","Only 1 defined applicability criterion (specific engine models)","Single requirement referencing an external technical document (Turbomeca Service Bulletin)","No nested conditions, exceptions, or cross-references to other legislation","Clear, unambiguous compliance deadline","Straightforward cause-and-effect safety rationale"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of specific Turbomeca Artouste turbine engines to carry out a safety modification to the **fuel shutoff valve control system**.\n\n**Who it affects:** Anyone operating aircraft with **Artouste III, B, B1, BF, or BF1** model engines (these are helicopter engines, commonly used in aircraft like the Alouette III).\n\n**The problem:** The fuel shutoff valve was found to be **partially closing by itself**, causing unexpected **engine power loss** — a serious flight safety risk.\n\n**What must be done:** Operators must follow **Turbomeca Service Bulletin Artouste 80-218-0083** (which describes Modification TU 153) to fix the valve control.\n\n**Deadline:** The modification had to be completed **before 31 December 1987**.\n\n**Why it matters:** This directive prevents engine failures in flight by ensuring the fuel shutoff valve operates correctly and doesn't inadvertently restrict fuel flow."}},"importantCases":[],"_links":{"self":"/api/acts/ad-artouste-6-fuel-shutoff-valve-control","history":"/api/acts/ad-artouste-6-fuel-shutoff-valve-control/history","analysis":"/api/acts/ad-artouste-6-fuel-shutoff-valve-control/analysis","conflicts":"/api/acts/ad-artouste-6-fuel-shutoff-valve-control/conflicts","importantCases":"/api/acts/ad-artouste-6-fuel-shutoff-valve-control/important-cases","documents":"/api/acts/ad-artouste-6-fuel-shutoff-valve-control/documents"}}