{"id":"F2006B08930","name":"AD/DH114/2 - Flap Spar - Modification","slug":"ad-dh114-2-flap-spar-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52506,"registerId":"commonwealth-F2006B08930-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH114/2 - Flap Spar - Modification","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/DH114/2 Flap Spar - Modification NK\n\nApplicability: All Series 1 and 2.\n\n \n\nDocument: 1. DH Heron Mod. No. 286; or\n\n \n\n2. ANO 105.1.14.17.5.2.\n\n \n\nCompliance: Forthwith.\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 discrete, single-issue airworthiness directive focused specifically on flap spar modification for one aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document — only 8 substantive lines","No defined terms section; all terms are standard aviation terminology","No conditional logic or nested exceptions","Simple binary compliance path (two acceptable documents)","Single unambiguous applicability clause ('All Series 1 and 2')","No cross-references to other legislation beyond the two implementation documents"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority for **DH114 Heron aircraft** — a British twin-engine airliner from the 1950s.\n\n**What it requires:**\n- **Who must comply:** Owners and operators of all Series 1 and 2 DH114 Heron aeroplanes\n- **What must be done:** A modification to the **flap spar** (a structural component that supports the aircraft's flaps — the hinged surfaces on the wings that help with lift during takeoff and landing)\n- **How to do it:** Follow either:\n  - De Havilland Heron Modification No. 286, OR\n  - Air Navigation Order 105.1.14.17.5.2\n- **When:** **Forthwith** — meaning immediately, without delay\n\n**Why it matters:**\nThis directive addresses a structural safety issue with the flap spar. If left unaddressed, this component could fail, potentially leading to loss of control during critical flight phases (takeoff or landing). The \"forthwith\" compliance requirement indicates this is treated as an urgent safety matter."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD text supplied gives no indication that its scope was altered from any prior instrument. It prescribes a modification for all DH114 (Heron) Series 1 and 2 aircraft and requires compliance forthwith. There is no statement within the text of the AD that narrows or expands applicability beyond that statement (See: \"Applicability\" and \"Compliance\")."},"complexity_factors":["Very short directive text with no technical detail inside the AD itself — requires consultation of external documents (Document) which adds practical complexity.","Immediate compliance deadline (\"Forthwith\") creates operational and scheduling pressure for operators (Compliance).","Broad applicability to all Series 1 and 2 aircraft concentrates responsibility on owners/operators but does not differentiate by condition or usage (Applicability).","No explanatory material, rationale, cost estimates or compliance options in the text — leaves substantive questions to the referenced documents and implementing organisations.","No express exemptions, staged compliance, or delegated discretion in the AD text, making the requirement administratively straightforward but operationally urgent."],"plain_english_summary":"This Airworthiness Directive mandates a \"Flap Spar - Modification\" for all DH114 (Heron) Series 1 and Series 2 aeroplanes. Owners and operators must have the modification carried out forthwith, following one of the two named technical documents.\n\nCompliance is mandatory, costs fall to the aircraft owners/operators, and no exemptions or alternative compliance paths are provided in the AD."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh114-2-flap-spar-modification","history":"/api/acts/ad-dh114-2-flap-spar-modification/history","analysis":"/api/acts/ad-dh114-2-flap-spar-modification/analysis","conflicts":"/api/acts/ad-dh114-2-flap-spar-modification/conflicts","importantCases":"/api/acts/ad-dh114-2-flap-spar-modification/important-cases","documents":"/api/acts/ad-dh114-2-flap-spar-modification/documents"}}