{"id":"F2006B08703","name":"AD/DART/18 - Flame Tube Suspension - Mod. 1736 Inspection","slug":"ad-dart-18-flame-tube-suspension-mod-1736-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51886,"registerId":"commonwealth-F2006B08703-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DART/18 - Flame Tube Suspension - Mod. 1736 Inspection","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/18 Flame Tube Suspension - Mod. 1736 Inspection 11/87\n\nApplicability: All Dart RDa-7 series engines.\n\n \n\nRequirement: 1. Action in accordance with Rolls Royce SB Da 72-470 Rev 3; or\n\n \n\n2. AD/RRT/30 Amdt 2.\n\n \n\nEffectivity: Forthwith.\n\n \n\nBackground: Reissue of AD/RRT/30 Amdt 2.\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":2,"scope_assessment":{"changed":false,"description":"The instrument is presented as a reissue of AD/RRT/30 Amendment 2 (Background). The applicability remains limited to Dart RDa-7 series engines and the directive continues to require compliance with the same referenced service bulletin or the earlier AD (Applicability; Requirement: 1 and 2). There is no text in this reissue indicating an expansion or narrowing of the affected population or of the mandatory actions, so the scope appears unchanged from the prior AD as reissued."},"complexity_factors":["Short, narrowly targeted directive applying to a single engine family (Applicability).","Two discrete compliance paths are offered rather than an open-ended alternative (Requirement: 1 and 2).","Key technical details (inspection procedures, intervals and corrective actions) are in external documents (Rolls Royce SB Da 72-470 Rev 3; AD/RRT/30 Amdt 2), requiring users to obtain and interpret those materials (Requirement: 1 and 2).","Immediate effectivity ('Forthwith') increases urgency but does not add procedural complexity (Effectivity).","No explicit provision in the text for alternative compliance methods or administrative discretion, concentrating complexity on finding and following the referenced documents (Requirement: 1 and 2)."],"plain_english_summary":"This reissued airworthiness directive requires immediate inspections of the flame‑tube suspension on Rolls‑Royce Dart RDa‑7 series engines. Affected aircraft owners/operators and their maintenance providers must follow either Rolls‑Royce Service Bulletin Da 72‑470 Rev 3 or the earlier AD/RRT/30 Amdt 2, bearing inspection, repair and downtime costs to ensure continued airworthiness."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, technical maintenance directive focused on a specific engine component. It has not expanded beyond its original safety purpose. The reissue of AD/RRT/30 Amdt 2 as AD/DART/18 represents administrative consolidation (re-categorising under the Dart engine series naming convention) rather than scope creep."},"complexity_factors":["Extremely short document — only 8 substantive lines","No defined terms section; all language is operational","Single mechanical requirement with two alternative compliance paths","No nested exceptions, conditional logic, or cross-references to other legislation beyond a single alternative AD reference","Background note is purely informational (reissue statement)","Written in standard aviation regulatory shorthand familiar to maintenance engineers"],"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 **Rolls-Royce Dart RDa-7 series aircraft engines** to inspect or modify the **flame tube suspension** (a component inside the engine's combustion chamber that holds the flame tube in place). Specifically, they must either:\n- Follow **Rolls-Royce Service Bulletin Da 72-470 Revision 3** (the manufacturer's official repair instructions), **or**\n- Comply with an alternative directive called **AD/RRT/30 Amendment 2**\n\n**Who it affects:** Anyone operating aircraft with Dart RDa-7 engines — typically older regional turboprop aircraft like the Fokker F27, some Vickers Viscount models, and Handley Page Herald.\n\n**Why it matters:** Flame tube suspension failures can cause engine damage, in-flight shutdowns, or fires. This directive is a **reissue** of an earlier safety order (AD/RRT/30 Amdt 2), meaning the requirement remains active and enforceable. The \"Effectivity: Forthwith\" means compliance is required **immediately** — not at the next scheduled maintenance.\n\n**Key takeaway:** If you fly or maintain an aircraft with this engine, you must have already done this inspection or modification. No grace period."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dart-18-flame-tube-suspension-mod-1736-inspection","history":"/api/acts/ad-dart-18-flame-tube-suspension-mod-1736-inspection/history","analysis":"/api/acts/ad-dart-18-flame-tube-suspension-mod-1736-inspection/analysis","conflicts":"/api/acts/ad-dart-18-flame-tube-suspension-mod-1736-inspection/conflicts","importantCases":"/api/acts/ad-dart-18-flame-tube-suspension-mod-1736-inspection/important-cases","documents":"/api/acts/ad-dart-18-flame-tube-suspension-mod-1736-inspection/documents"}}