{"id":"F2006B08936","name":"AD/DH114/26 Amdt 1 - Wing/Fuselage Lower Main Root Joints - Inspection","slug":"ad-dh114-26-amdt-1-wing-fuselage-lower-main-root-joints-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52529,"registerId":"commonwealth-F2006B08936-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH114/26 Amdt 1 - Wing/Fuselage Lower Main Root Joints - 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\n# AD/DH114/26\n\nAmdt 1\n\nApplicability: All models.\n\n\n# Wing/Fuselage Lower Main NK Root Joints - Inspection\n\n \n\nRequirement: Inspect the wing to fuselage lower main root joints for corrosion, fretting and cracking in accordance with Hawker Siddeley Technical News Sheet Heron (114) No. W.9, Issue 5.\n\n \n\nNote 1: Inspection of the fitting in accordance with Paras. 1.1 and 1.3 of the previous issue of this Directive is to be regarded as equivalent to compliance with TNS Heron\n\n(114) No. W.17.\n\n \n\nNote 2: Fluorescent magnetic particle inspection in accordance with ANO 108.8 is an acceptable alternative to the eddy current check specified in Appendix 2 of TNS Heron (114) No. W.9, Issue 5.\n\n \n\nNote 3: DoT eddy current technique ATC/NDI/EC2 may be used as an alternative to that specified in Appendix 2 to TNS Item (114) No. W.9, Issue 5.\n\n \n\nCompliance: In accordance with TNS Heron (114) No. W.9, Issue 5.\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 Amendment 1 to an existing Airworthiness Directive. The scope remains tightly focused on the original purpose: inspecting wing/fuselage root joints on DH114 Heron aircraft. The amendment appears to add alternative inspection methods (Notes 2 and 3 regarding fluorescent magnetic particle inspection and DoT eddy current technique) without expanding the substantive scope beyond the specific structural inspection requirement."},"complexity_factors":["Very short document (approximately 250 words)","Only 3 defined references to external technical documents (TNS Heron (114) No. W.9 Issue 5, ANO 108.8, ATC/NDI/EC2)","Simple conditional logic: one primary requirement with three explicit alternative compliance pathways (Notes 1-3)","No nested exceptions or cross-references to other legislation","Single applicability clause covering all models","No interpretation section or defined terms within the document itself"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires owners and operators of de Havilland DH114 Heron aeroplanes to inspect the wing-to-fuselage lower main root joints for corrosion, fretting and cracking, following Hawker Siddeley Technical News Sheet Heron (114) No. W.9, Issue 5. It permits certain accepted alternative and prior inspection methods. The measure targets aging structural joints to prevent catastrophic wing failure and keep these vintage aircraft safe to fly."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive continues to apply to all DH114 (Heron) models and maintains the core requirement to inspect the lower main root joints. The amendment specifies TNS Heron (114) No. W.9 Issue 5 as the standard and clarifies acceptable alternative NDI methods and equivalence to prior inspections, but does not expand the set of aircraft or fundamentally alter the inspection requirement."},"complexity_factors":["Reliance on an external technical document (Hawker Siddeley TNS Heron (114) No. W.9, Issue 5) for the substantive inspection procedure (Requirement / Compliance).","Equivalence clause referencing a previous issue of the directive (Note 1) creates cross‑document interpretation needs.","Multiple acceptable non‑destructive inspection (NDI) alternatives specified (fluorescent magnetic particle; DoT eddy current technique) requiring operators to choose method and potentially different suppliers (Notes 2 & 3).","Broad applicability ('All models') increases the universe of affected operators and maintenance planners (Applicability).","Enforcement and compliance are tied to following the TNS specification, creating administrative burden to demonstrate conformity (Compliance)."],"plain_english_summary":"This airworthiness directive requires operators of DH114 (Heron) series aeroplanes to inspect the wing-to-fuselage lower main root joints for corrosion, fretting and cracking in accordance with Hawker Siddeley Technical News Sheet Heron (114) No. W.9, Issue 5. It applies to all models. Operators must pay for and perform the inspections; the directive allows alternative non‑destructive inspection methods (fluorescent magnetic particle and a DoT eddy‑current technique) and accepts certain prior inspections as equivalent, which affects choice of technique and inspection cost."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh114-26-amdt-1-wing-fuselage-lower-main-root-joints-inspection","history":"/api/acts/ad-dh114-26-amdt-1-wing-fuselage-lower-main-root-joints-inspection/history","analysis":"/api/acts/ad-dh114-26-amdt-1-wing-fuselage-lower-main-root-joints-inspection/analysis","conflicts":"/api/acts/ad-dh114-26-amdt-1-wing-fuselage-lower-main-root-joints-inspection/conflicts","importantCases":"/api/acts/ad-dh114-26-amdt-1-wing-fuselage-lower-main-root-joints-inspection/important-cases","documents":"/api/acts/ad-dh114-26-amdt-1-wing-fuselage-lower-main-root-joints-inspection/documents"}}