{"id":"F2006B08929","name":"AD/DH114/19 - Engine Fire Extinguisher Discharge Nozzle - Inspection","slug":"ad-dh114-19-engine-fire-extinguisher-discharge-nozzle-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52502,"registerId":"commonwealth-F2006B08929-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH114/19 - Engine Fire Extinguisher Discharge Nozzle - 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 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  DH114 (Heron) Series Aeroplanes\n\n \n\nAD/DH114/19 Engine Fire Extinguisher Discharge NK\n\nNozzle - Inspection\n\n \n\nApplicability: All models.\n\n \n\nDocument: Hawker Siddeley TNS Heron (114) No. M6.\n\n \n\nCompliance: Installed engines - Within 100 hours time in service from 15 June 1967. Spare engines - Before installation after 15 June 1967.\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":2,"scope_assessment":{"changed":false,"description":"Based solely on the directive text provided, the scope is explicit: it applies to all Heron (DH114) models and prescribes inspection timing for installed and spare engines. The document does not indicate any expansion or narrowing beyond that stated applicability and the specified compliance times."},"complexity_factors":["Clear and narrow subject matter (single component: engine fire-extinguisher discharge nozzle).","Simple applicability language (‘All models’) reduces eligibility ambiguity.","Short, specific compliance windows (installed engines vs spares) simplify scheduling decisions.","External dependence: inspection procedure is specified in a separate manufacturer document (Hawker Siddeley TNS Heron (114) No. M6), creating a cross-reference that increases implementation complexity slightly.","No detailed enforcement, recordkeeping, or remedial-action text in the directive itself — implementers must consult the referenced document or regulator for procedural detail."],"plain_english_summary":"This directive requires inspection of the engine fire‑extinguisher discharge nozzle on all Hawker Siddeley Heron (DH114) aircraft, using Hawker Siddeley TNS Heron (114) No. M6. For engines already installed the check must be done within 100 hours TIS from 15 June 1967; spare engines must be inspected before any installation after that date.\n\nIt affects DH114 owners/operators (who pay and schedule work) and maintenance providers (who perform the inspection). Its purpose is to ensure the extinguisher system will operate when needed, imposing modest cost and timing constraints."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a vintage 1967 airworthiness directive. It remains precisely scoped to its original purpose: ensuring fire extinguisher discharge nozzles on a specific aircraft type are inspected. There is no evidence of scope creep — the directive is narrow, technical, and unchanged from its original safety intent."},"complexity_factors":["Extremely short document (under 200 words)","Only 2 substantive operative paragraphs (Applicability and Compliance)","No defined terms section","No cross-references to other legislation beyond the enabling regulation (Civil Aviation Regulations 1998, Part 39)","Simple binary applicability ('All models')","Straightforward compliance deadlines with clear temporal triggers","Single external document reference with no conditional logic"],"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 **DH114 (Heron) series aeroplanes** to inspect the **engine fire extinguisher discharge nozzles** on these aircraft.\n\n**Who it affects:** Anyone who owns, operates, or maintains DH114 Heron aircraft — a British twin-engine propeller aircraft from the 1950s-60s.\n\n**The requirements:**\n- **For engines already installed:** The inspection must be done within **100 hours of flying time** after 15 June 1967\n- **For spare engines:** The inspection must be done **before installation** if being fitted after 15 June 1967\n\n**Why it matters:** Fire extinguisher discharge nozzles are critical safety equipment. If they fail, an engine fire cannot be suppressed, potentially causing catastrophic loss of the aircraft and lives. This AD ensures these components are checked for defects before they can fail in service.\n\n**Key detail:** This directive references a specific technical document — *Hawker Siddeley TNS Heron (114) No. M6* — which presumably contains the detailed inspection procedure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh114-19-engine-fire-extinguisher-discharge-nozzle-inspection","history":"/api/acts/ad-dh114-19-engine-fire-extinguisher-discharge-nozzle-inspection/history","analysis":"/api/acts/ad-dh114-19-engine-fire-extinguisher-discharge-nozzle-inspection/analysis","conflicts":"/api/acts/ad-dh114-19-engine-fire-extinguisher-discharge-nozzle-inspection/conflicts","importantCases":"/api/acts/ad-dh114-19-engine-fire-extinguisher-discharge-nozzle-inspection/important-cases","documents":"/api/acts/ad-dh114-19-engine-fire-extinguisher-discharge-nozzle-inspection/documents"}}