{"id":"F2006B08720","name":"AD/DART/7 - Aeroquip Fuel Pipes - Mod. 1587","slug":"ad-dart-7-aeroquip-fuel-pipes-mod-1587","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51930,"registerId":"commonwealth-F2006B08720-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DART/7 - Aeroquip Fuel Pipes - Mod. 1587","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)  Rolls Royce Turbine Engines - Dart Series\n\n \n\nAD/DART/7 Aeroquip Fuel Pipes - Mod. 1587 11/87\n\nApplicability: All Dart RDa-6, RDa-7 series engines.\n\n \n\nRequirement: 1. Action in accordance with Rolls Royce SB Da 73-73; or\n\n \n\n2. AD/RRT/18.\n\n \n\nEffectivity: Forthwith.\n\n \n\nBackground: Reissue of AD/RRT/18.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted safety directive focused specifically on fuel pipe modifications for two engine series. It has not expanded beyond its original technical safety purpose."},"complexity_factors":["Extremely short document (under 200 words)","Only 2 defined applicability criteria (engine models)","Simple binary compliance path (Option 1 OR Option 2)","No nested exceptions or conditional logic","No cross-references to other legislation beyond a single related AD","Single technical reference to manufacturer service bulletin"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners or operators of certain Rolls-Royce Dart aircraft engines to take specific action regarding Aeroquip fuel pipes (part of the engine's fuel system). They must either:\n- Follow the instructions in **Rolls-Royce Service Bulletin Da 73-73** (a technical notice from the engine manufacturer); OR\n- Comply with another directive called **AD/RRT/18**\n\n**Who it affects:** Anyone operating aircraft with **Dart RDa-6 or RDa-7 series engines** — these are turboprop engines commonly used in older regional aircraft like the Fokker F27 and some Vickers Viscount models.\n\n**Why it matters:** Fuel pipe failures can cause engine fires or fuel leaks. This directive ensures fuel pipes are inspected, modified, or replaced to prevent catastrophic failures. The \"Forthwith\" effectivity means compliance is required **immediately** — no grace period.\n\n**Key context:** This directive (from November 1987) is a reissue of an earlier safety order (AD/RRT/18), suggesting the original requirement needed clarification or reinforcement."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive is presented as a reissue of AD/RRT/18 (Background) and retains the same applicability (all Dart RDa-6 and RDa-7 series engines) and the same compliance routes (Rolls Royce SB Da 73-73 or AD/RRT/18) (Applicability; Requirement). There is no indication in the text that the scope or affected population has been expanded or narrowed relative to the prior AD."},"complexity_factors":["Narrow applicability limited to Rolls-Royce Dart RDa-6 and RDa-7 engines (Applicability).","Short directive that mandates compliance by reference to external documents (Rolls Royce SB Da 73-73 and AD/RRT/18), requiring users to obtain and interpret those documents (Requirement).","Immediate effectivity increases operational urgency and logistical complexity for owners/operators (Effectivity).","Binary compliance options reduce decision complexity but create dependency on the content and availability of the referenced service bulletin or prior AD (Requirement).","Minimal procedural detail in the directive itself means enforcement and verification rely on external technical documents and maintenance records (Requirement)."],"plain_english_summary":"This airworthiness directive, reissuing AD/RRT/18, requires immediate corrective action on Rolls‑Royce Dart RDa‑6 and RDa‑7 engines to address an Aeroquip fuel‑pipe issue by following Rolls‑Royce SB Da 73‑73 or the prior AD. It affects aircraft owners/operators and maintenance organisations, who must bear compliance costs and choose one of the two routes. CASA mandates compliance forthwith, increasing urgency for parts, labour and scheduling."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dart-7-aeroquip-fuel-pipes-mod-1587","history":"/api/acts/ad-dart-7-aeroquip-fuel-pipes-mod-1587/history","analysis":"/api/acts/ad-dart-7-aeroquip-fuel-pipes-mod-1587/analysis","conflicts":"/api/acts/ad-dart-7-aeroquip-fuel-pipes-mod-1587/conflicts","importantCases":"/api/acts/ad-dart-7-aeroquip-fuel-pipes-mod-1587/important-cases","documents":"/api/acts/ad-dart-7-aeroquip-fuel-pipes-mod-1587/documents"}}