{"id":"F2006B08794","name":"AD/DC3/17 - Elevator Tab Control Horn - Inspection","slug":"ad-dc3-17-elevator-tab-control-horn-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52144,"registerId":"commonwealth-F2006B08794-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DC3/17 - Elevator Tab Control Horn - 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)  Douglas DC3 Series Aeroplanes\n\n \n\n \n\n| AD/DC3/17 |  | Elevator Tab Control Horn - Inspection | NK |\n| --- | --- | --- | --- |\n| Document: | 1. | Douglas SB (DC3) No. 234 Section 1; or |  |\n|  | 2. | FAA AD 44-15-1; or |  |\n|  | 3 | ANO 105.1.16.1.6.2. |  |\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 \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 appears to be a standard, narrow airworthiness directive focused on a specific mechanical inspection for a specific aircraft type. There is no indication of scope creep; it maintains the typical limited scope of individual ADs targeting particular safety concerns."},"complexity_factors":["Extremely short document — essentially a reference table with minimal substantive text","No defined terms section — relies entirely on external technical documents","Simple structure: identifier, subject matter, and list of three reference documents","No conditional logic, exceptions, or procedural steps contained within the directive itself","Complexity is offloaded to referenced technical documents (Douglas SB, FAA AD, ANO) rather than contained in this instrument"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order — issued by Australia's Civil Aviation Safety Authority (CASA) for **Douglas DC-3 aircraft**.\n\n**What it does:**\n- Requires owners and operators of DC-3 aeroplanes to inspect the **elevator tab control horn** — a mechanical component that helps control the aircraft's pitch (up and down movement).\n- The directive references three technical documents that provide the specific inspection procedures:\n  1. Douglas Service Bulletin No. 234 Section 1\n  2. FAA Airworthiness Directive 44-15-1 (from the United States)\n  3. ANO 105.1.16.1.6.2 (an Australian National Order)\n\n**Who it affects:**\n- Owners, operators, and maintenance organisations responsible for Douglas DC-3 series aircraft registered in Australia.\n\n**Why it matters:**\n- Airworthiness Directives are legally binding safety requirements. Non-compliance can ground an aircraft or result in penalties.\n- This particular AD addresses a specific mechanical component that, if it fails, could compromise the pilot's ability to control the aircraft's pitch attitude — a critical safety issue.\n- The DC-3 is a vintage aircraft (first flown in the 1930s), so ongoing airworthiness monitoring through directives like this is essential for continued safe operation."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD as provided applies to Douglas DC3 series aeroplanes and requires inspection of the elevator tab control horn by following one of three referenced documents. The instrument text shows no indication that its substantive scope (what aircraft/components are covered and that an inspection is required) has been changed from any prior statement within this source. The document delegates technical specifics to the listed external documents rather than altering the AD's stated subject or applicability."},"complexity_factors":["Very short primary text: the AD identifies the subject (elevator tab control horn) and references external documents rather than detailing procedures.","Compliance depends on three external documents (Douglas SB No. 234 Section 1; FAA AD 44-15-1; ANO 105.1.16.1.6.2), creating multiple compliance pathways.","The AD text does not state inspection intervals, pass/fail criteria, or mandatory corrective actions — operators must consult referenced materials for technical detail.","Enforcement and verification require cross-checking which referenced document was used and whether its procedures were followed, increasing administrative steps despite simple substantive requirement.","Applicability is limited (Douglas DC3 series), so the operational scope is narrow even though procedural reliance on other materials adds administrative dependency."],"plain_english_summary":"This Civil Aviation Safety Authority airworthiness directive requires inspection of the elevator tab control horn on Douglas DC3 series aeroplanes and mandates compliance by following one of three referenced procedures.  \n\nIt affects DC3 owners/operators (who pay for inspections/repairs), maintenance organisations/licensed engineers (who must carry out the work to a listed standard), and CASA (which enforces the AD); it matters because it imposes a safety-driven inspection obligation with associated costs, scheduling impact and reliance on the external referenced documents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dc3-17-elevator-tab-control-horn-inspection","history":"/api/acts/ad-dc3-17-elevator-tab-control-horn-inspection/history","analysis":"/api/acts/ad-dc3-17-elevator-tab-control-horn-inspection/analysis","conflicts":"/api/acts/ad-dc3-17-elevator-tab-control-horn-inspection/conflicts","importantCases":"/api/acts/ad-dc3-17-elevator-tab-control-horn-inspection/important-cases","documents":"/api/acts/ad-dc3-17-elevator-tab-control-horn-inspection/documents"}}