{"id":"F2006B08932","name":"AD/DH114/22 - Wing Strap For Engine Mounting Pick-Up - Inspection","slug":"ad-dh114-22-wing-strap-for-engine-mounting-pick-up-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52514,"registerId":"commonwealth-F2006B08932-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH114/22 - Wing Strap For Engine Mounting Pick-Up - 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/DH114/22 Wing Strap For Engine Mounting NK\n\nPick-Up - Inspection\n\n \n\nApplicability: All models.\n\n \n\nDocument: Hawker Siddeley TNS Heron (114) No. W.15.\n\n \n\nCompliance: Within 300 hours time in service after 20 February 1970 and thereafter in accordance with 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","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The source text does not compare this directive to an earlier or later instrument and supplies no basis to determine a change in scope from an original intent. The AD as published applies to \"All models\" of the DH114 (Heron) and requires an initial inspection within 300 hours TIS after 20 February 1970 and thereafter in accordance with the named Hawker Siddeley document (Applicability; Compliance; Document). No evidence in the text indicates a change of scope."},"complexity_factors":["Simple, single-subject requirement (inspection of wing strap at engine mounting pick-up).","Delegation of procedural detail to an external technical document (Hawker Siddeley TNS Heron (114) No. W.15) increases practical complexity for implementers who must obtain and follow that document (Document).","Fixed initial compliance window tied to a historical date (300 hours TIS after 20 February 1970) requires operators to compute applicability against aircraft hours records (Compliance).","No inspection method, pass/fail criteria, or corrective-action rules are contained in the AD itself, so compliance depends on interpreting and applying the external requirement document (Document)."],"plain_english_summary":"What this directive does, in plain terms\n\n- This is an airworthiness directive that requires operators of the DH114 (Heron) series aeroplanes to inspect the wing strap used for the engine mounting pick-up.\n- It applies to all models of the DH114 (Heron) series (see “Applicability: All models”).\n- The inspection must be done within 300 hours time in service after 20 February 1970 and then repeated or otherwise carried out thereafter in the manner set out in the referenced requirement document (see “Compliance” and “Document: Hawker Siddeley TNS Heron (114) No. W.15”).\n\nHow it works mechanically\n\n- The directive imposes an affirmative compliance obligation on operators: carry out the initial inspection within the stated 300 hours TIS window measured from 20 February 1970, then follow the inspection/maintenance regime set out in Hawker Siddeley TNS Heron (114) No. W.15 for subsequent actions (Compliance; Document).\n- The AD does not itself describe inspection methods, intervals beyond the initial 300 hours, or corrective actions; those details are delegated to the referenced requirement document (Document).\n\nWho pays and who decides\n\n- Aircraft operators or registered owners of DH114 (Heron) aeroplanes pay for the inspection and any repairs or downtime caused by compliance (implicit from the compliance obligation) (Applicability; Compliance).\n- The Civil Aviation Safety Authority issues the directive; the technical specification for ongoing action is set out in the Hawker Siddeley requirement document named in the AD (Document).\n\nPractical effects, incentives and trade-offs\n\n- Operators must plan for aircraft time out of service for the initial inspection (within 300 hours TIS after the stated date) and for whatever ongoing inspections or maintenance the Hawker Siddeley document requires (Compliance; Document).\n- The AD shifts the technical detail and ongoing judgement about inspection frequency and methods to the manufacturer document; operators must obtain and follow that document to remain compliant (Document). This creates a compliance burden of locating and following an external technical requirement.\n- The directive creates a clear, time-based trigger for the first inspection (300 hours after 20 February 1970). After that, the operational and cost impacts depend on the content of the referenced document (Compliance; Document).\n\nWhat the directive claims to achieve\n\n- The directive’s title and content indicate the purpose is an inspection requirement for the wing strap at the engine mounting pick-up. The AD itself supplies no separate statement of safety findings or incident history; the operational requirement is established by the AD text and the named technical document (title and Document)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused on a specific safety inspection for a specific aircraft type. It has not expanded beyond its original purpose of ensuring the structural integrity of engine mounting straps on DH114 Heron aircraft."},"complexity_factors":["Very short document (under 200 words)","Only one substantive requirement (inspection of a specific component)","Single defined applicability (all DH114 models)","Simple compliance structure (time-based trigger + ongoing requirement)","No nested exceptions, conditional logic, or cross-references to other legislation","Refers to external technical document rather than embedding complex procedures"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires owners and operators of specific aircraft to take action.\n\n**What it does:**\n- Requires inspection of the **wing strap for engine mounting pick-up** on **DH114 (Heron) series aeroplanes** — a British twin-engine aircraft from the 1950s-60s.\n- The inspection must happen **within 300 hours of flying time** after 20 February 1970, and then ongoing as specified in the technical document referenced.\n\n**Who it affects:**\n- Anyone who owns, operates, or maintains DH114 Heron aircraft in Australia.\n\n**Why it matters:**\n- Engine mounting structures are critical for safety. A failed wing strap could lead to engine separation or structural failure. This directive ensures potential defects are caught before they cause accidents.\n\n**Key details:**\n- **Compliance deadline:** 300 flight hours after 20 February 1970 (so this is a historical directive, though it remains on the books for any remaining aircraft).\n- **Technical reference:** Hawker Siddeley Technical Note W.15 (the manufacturer’s instructions for how to do the inspection)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh114-22-wing-strap-for-engine-mounting-pick-up-inspection","history":"/api/acts/ad-dh114-22-wing-strap-for-engine-mounting-pick-up-inspection/history","analysis":"/api/acts/ad-dh114-22-wing-strap-for-engine-mounting-pick-up-inspection/analysis","conflicts":"/api/acts/ad-dh114-22-wing-strap-for-engine-mounting-pick-up-inspection/conflicts","importantCases":"/api/acts/ad-dh114-22-wing-strap-for-engine-mounting-pick-up-inspection/important-cases","documents":"/api/acts/ad-dh114-22-wing-strap-for-engine-mounting-pick-up-inspection/documents"}}