{"id":"F2006B08957","name":"AD/DH114/45 - Tailplane Upper Pick-Up Eyebolt in Bulkhead 7 - Inspection","slug":"ad-dh114-45-tailplane-upper-pick-up-eyebolt-in-bulkhead-7-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52525,"registerId":"commonwealth-F2006B08957-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH114/45 - Tailplane Upper Pick-Up Eyebolt in Bulkhead 7 - 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/DH114/45 Tailplane Upper Pick-Up Eyebolt NK\n\nin Bulkhead 7 - Inspection\n\n \n\nApplicability: All models.\n\n \n\nDocument:  British Aerospace TNS Heron (114) No. F.21. Compliance: Before 31 May 1979.\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 directive, as supplied, sets a single, specific inspection requirement applicable to all DH114 models and prescribes a compliance date; it does not indicate any expansion or narrowing of scope relative to its own stated requirement. The AD does not reference any amendment or variation to prior directives in the supplied text. [Title; Applicability; Compliance]"},"complexity_factors":["Narrow technical focus: single component (tailplane upper pick-up eyebolt) and single location (Bulkhead 7). [Title]","Clear applicability: applies to all DH114 (Heron) models, no conditional carve-outs. [Applicability]","Single deadline: a fixed compliance date reduces procedural complexity. [Compliance]","Reliance on an external manufacturer document for procedure increases operational dependence on that document but does not add legal complexity to the AD text itself. [Document]","Limited textual detail in the AD—procedure, scope of inspection and remedial actions are not set out in the supplied text, so operational complexity depends on the referenced technical note. [Document]"],"plain_english_summary":"This AD mandates an inspection of the tailplane upper pick‑up eyebolt in Bulkhead 7 on all DH114 (Heron) aircraft, to be carried out in accordance with British Aerospace TNS Heron (114) No. F.21 and completed before 31 May 1979. It affects owners/operators (who fund and schedule the work) and maintenance organisations required to perform the inspection."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive focused on one specific mechanical component on one aircraft type. It has not expanded beyond its original narrow technical scope."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","No defined terms section — relies on external technical reference (British Aerospace TNS)","No conditional logic or exceptions — simple mandatory inspection with single deadline","Single cross-reference to external technical document (TNS Heron No. F.21)","No nested provisions or subsections","Straightforward applicability clause ('All models')"],"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 requires:** Owners and operators of **de Havilland DH114 Heron series aircraft** must inspect a specific structural component — the **tailplane upper pick-up eyebolt located in Bulkhead 7** — before 31 May 1979.\n\n**Why it matters:** The \"tailplane\" is the horizontal stabiliser at the rear of the aircraft (the small wings that keep the plane level). The \"eyebolt\" is a bolt with a looped head that attaches this critical component to the fuselage. If this bolt fails, the tailplane could detach with catastrophic consequences. This directive mandates a one-time inspection to catch potential failures before they cause accidents.\n\n**Who must comply:** Anyone operating DH114 Heron aircraft in Australia — this covers all models of this particular aircraft type.\n\n**Key details:**\n- **Compliance deadline:** Before 31 May 1979 (now long past — this is a historical directive)\n- **Source document:** British Aerospace Technical Note Sheet (TNS) Heron (114) No. F.21\n- **Nature of action:** Inspection (not necessarily replacement, unless defects found)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh114-45-tailplane-upper-pick-up-eyebolt-in-bulkhead-7-inspection","history":"/api/acts/ad-dh114-45-tailplane-upper-pick-up-eyebolt-in-bulkhead-7-inspection/history","analysis":"/api/acts/ad-dh114-45-tailplane-upper-pick-up-eyebolt-in-bulkhead-7-inspection/analysis","conflicts":"/api/acts/ad-dh114-45-tailplane-upper-pick-up-eyebolt-in-bulkhead-7-inspection/conflicts","importantCases":"/api/acts/ad-dh114-45-tailplane-upper-pick-up-eyebolt-in-bulkhead-7-inspection/important-cases","documents":"/api/acts/ad-dh114-45-tailplane-upper-pick-up-eyebolt-in-bulkhead-7-inspection/documents"}}