{"id":"F2006B08921","name":"AD/DH114/11 - Wing Rear Spar - Inspection","slug":"ad-dh114-11-wing-rear-spar-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52475,"registerId":"commonwealth-F2006B08921-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH114/11 - Wing Rear Spar - 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/DH114/11 Wing Rear Spar - Inspection NK\n\nApplicability: All models not modified in accordance with DH Heron Mod. No. 1454. Document:  De Havilland TNS Series Heron (114) No. W.10, Issue 2.\n\nCompliance: Before 31 May 1961.\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\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD itself sets a single-scope requirement: inspect the wing rear spar on all DH114 models not modified by DH Heron Mod. No. 1454 before 31 May 1961. The document contains no indication that the scope was altered from an earlier statement or that it has been amended; it reads as an original directive limited to that inspection requirement (Applicability; Compliance; Document)."},"complexity_factors":["Single mandated action (inspection) with a single compliance deadline (Compliance)","Clear applicability rule with a specific modification-based exemption (Applicability)","Dependence on an external technical document for procedural detail (Document)","No iterative inspection schedule or follow-up procedures stated in the AD text","Ambiguous notation (\"NK\") present in title without explanation","No enforcement mechanisms, acceptance criteria, or remedial thresholds set out in the AD text"],"plain_english_summary":"This AD mandates a one‑time inspection of the wing rear spar on De Havilland Heron (DH114) aeroplanes not modified by DH Heron Mod. No. 1454, to be carried out per De Havilland TNS Series Heron (114) No. W.10, Issue 2, before 31 May 1961. Owners/operators must arrange and pay for the inspection and any repairs; modified aircraft are exempt. The AD relies on the referenced document for technical procedure and remedial detail."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive focused on a specific aircraft type and specific structural component. It has not expanded beyond its original purpose of mandating a one-time inspection for wing spar integrity."},"complexity_factors":["Very short document (approximately 150 words)","Only 1 defined term implicitly referenced (the modification number)","No cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","Simple conditional logic: applies to all models EXCEPT those with Mod. No. 1454","Single compliance requirement with clear deadline","No nested exceptions or subsections"],"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 **De Havilland DH114 Heron series aeroplanes** to inspect the **wing rear spar** (a critical structural component that helps hold the wing together) before 31 May 1961.\n\n**Who it affects:** Anyone who owns or operates a DH114 Heron aircraft that has **not** been modified according to \"DH Heron Mod. No. 1454\" (a specific factory modification). If your plane has that modification, this directive doesn't apply to you.\n\n**Why it matters:** The rear spar is essential for wing structural integrity. This directive likely addresses a discovered defect or fatigue issue that could lead to wing failure if not inspected. The compliance deadline (31 May 1961) indicates this was an urgent safety measure at the time of issue.\n\n**How to comply:** Operators must follow the technical instructions in **De Havilland TNS Series Heron (114) No. W.10, Issue 2** — a manufacturer-issued technical document that specifies exactly how to perform the inspection."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh114-11-wing-rear-spar-inspection","history":"/api/acts/ad-dh114-11-wing-rear-spar-inspection/history","analysis":"/api/acts/ad-dh114-11-wing-rear-spar-inspection/analysis","conflicts":"/api/acts/ad-dh114-11-wing-rear-spar-inspection/conflicts","importantCases":"/api/acts/ad-dh114-11-wing-rear-spar-inspection/important-cases","documents":"/api/acts/ad-dh114-11-wing-rear-spar-inspection/documents"}}