{"id":"F2006B08933","name":"AD/DH114/23 - Fin Attachment Brackets - Inspection","slug":"ad-dh114-23-fin-attachment-brackets-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52518,"registerId":"commonwealth-F2006B08933-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH114/23 - Fin Attachment Brackets - 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/DH114/23 Fin Attachment Brackets - Inspection NK\n\nApplicability: All models.\n\n \n\nDocument: Hawker Siddeley TNS Heron (114) No. F.15, Issue 2. Compliance:  As detailed in the requirement document.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive focused on a specific safety-critical inspection. It has not expanded beyond its original purpose of ensuring structural integrity of fin attachment brackets on the DH114 Heron aircraft."},"complexity_factors":["Extremely short document (under 200 words)","Only one substantive requirement: inspect fin attachment brackets per referenced technical document","No defined terms section — relies entirely on external technical reference (Hawker Siddeley TNS F.15)","No conditional logic, exceptions, or nested provisions","Single applicability clause ('All models') with no exclusions or sub-categories","Cross-reference is simple and singular (one technical note)"],"plain_english_summary":"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:**\n- Requires owners and operators of **DH114 (Heron) series aeroplanes** to inspect the **fin attachment brackets** (the structural parts that connect the vertical tail fin to the aircraft fuselage).\n- The inspection must follow the specific procedures in **Hawker Siddeley Technical Note F.15, Issue 2**.\n\n**Who it affects:**\n- Anyone who owns, operates, or maintains a DH114 Heron aircraft (a British twin-engine airliner from the 1950s, now mostly used in heritage or charter operations).\n\n**Why it matters:**\n- Fin attachment brackets are critical structural components. If they fail, the vertical stabiliser could separate from the aircraft, causing catastrophic loss of control.\n- This AD ensures potential cracks, corrosion, or fatigue in these brackets are detected before they become dangerous.\n- Compliance is **legally mandatory** — you cannot fly the aircraft until the inspection is done as specified."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Based on the supplied text alone, there is no indication the AD changes scope from its stated coverage. The directive explicitly applies to all DH114 (Heron) models (\"Applicability: All models\") and delegates the specific inspection and repair requirements to the referenced document (\"Document: Hawker Siddeley TNS Heron (114) No. F.15, Issue 2\"; \"Compliance: As detailed in the requirement document\")."},"complexity_factors":["Short-form AD with no procedural detail — the AD refers to an external requirement document for technical steps and timings (\"Document: Hawker Siddeley TNS Heron (114) No. F.15, Issue 2\"; \"Compliance: As detailed in the requirement document\").","Applicability covers all models, which widens the affected population but keeps the coverage unambiguous (\"Applicability: All models\").","Dependence on obtaining and following a separate document increases administrative steps and creates an information-access dependency (\"Document: ... Issue 2\").","Issued under the Civil Aviation safety framework (header referencing Part 39 - 105), so compliance is a regulatory obligation rather than optional guidance (document header)."],"plain_english_summary":"### What the directive requires\n\n- This is Airworthiness Directive AD/DH114/23, titled \"Fin Attachment Brackets - Inspection\" (AD number and title appear at the top of the document). \n- Applicability: the directive applies to all DH114 (Heron) series aeroplanes (\"Applicability: All models\").\n- The technical actions required (the specific inspections, inspection intervals, and any repair or follow-up actions) are not set out in this short notice. Instead the AD refers to a separate requirement document: \"Hawker Siddeley TNS Heron (114) No. F.15, Issue 2\" (\"Document: Hawker Siddeley TNS Heron (114) No. F.15, Issue 2\").\n- Compliance obligation: operators must follow the procedures and timings as detailed in that referenced requirement document (\"Compliance: As detailed in the requirement document\").\n\n### Compliance and economic implications\n\n- Who must act: operators/owners of DH114 (Heron) series aeroplanes are the affected parties because the directive applies to all models (\"Applicability: All models\").\n- What actions will occur: inspections of the fin attachment brackets, and any repairs required by the referenced document, will be performed (requirement set out in the referenced document; \"Document: ... Issue 2\"; \"Compliance: As detailed in the requirement document\").\n- Who bears costs: the direct economic burden of arranging and paying for inspections, labour and any repairs rests with the aircraft operator or owner who must comply with the directive (inferred from the compliance instruction to follow the requirement document; \"Compliance: As detailed in the requirement document\").\n- Who may provide services: maintenance organisations and parts suppliers will perform the inspections and repairs specified in the referenced document (service provision follows from the requirement to carry out the inspections; \"Compliance: As detailed in the requirement document\").\n- Operational effect: carrying out inspections and any required repairs will take aircraft out of service for some period, thereby reducing available flight hours during the work (mechanical consequence of inspections and repairs implied by the compliance requirement; \"Compliance: As detailed in the requirement document\").\n- Information gap: the AD notice itself does not include the inspection procedures, intervals, or corrective-action criteria; those details are in the referenced Hawker Siddeley document (\"Document: Hawker Siddeley TNS Heron (114) No. F.15, Issue 2\"), so affected parties must obtain and follow that document to know the exact technical and timing requirements (\"Compliance: As detailed in the requirement document\")."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh114-23-fin-attachment-brackets-inspection","history":"/api/acts/ad-dh114-23-fin-attachment-brackets-inspection/history","analysis":"/api/acts/ad-dh114-23-fin-attachment-brackets-inspection/analysis","conflicts":"/api/acts/ad-dh114-23-fin-attachment-brackets-inspection/conflicts","importantCases":"/api/acts/ad-dh114-23-fin-attachment-brackets-inspection/important-cases","documents":"/api/acts/ad-dh114-23-fin-attachment-brackets-inspection/documents"}}