{"id":"F2006B08857","name":"AD/DH 104/13 - Crossed Aileron Control Cables - Inspection","slug":"ad-dh-104-13-crossed-aileron-control-cables-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52056,"registerId":"commonwealth-F2006B08857-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 104/13 - Crossed Aileron Control Cables - 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)  DH 104 (Dove) Series Aeroplanes\n\n \n\nAD/DH 104/13 Crossed Aileron Control Cables - Inspection NK\n\nApplicability: All models.\n\n \n\nDocument: De Havilland TNS CT(104) No. 171.\n\n \n\nCompliance: On each occasion when aileron control circuit is disturbed.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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 preventing crossed aileron control cables in one aircraft type. It has not expanded beyond its original narrow safety purpose."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 1 defined term implicitly referenced (the technical document TNS CT(104) No. 171)","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1988","Simple conditional trigger: compliance required 'on each occasion when aileron control circuit is disturbed'","No nested exceptions or conditional logic","Single applicability criterion ('All models')","Straightforward command structure: identify aircraft → identify trigger → perform action"],"plain_english_summary":"This is an **Airworthiness Directive** (AD) — a mandatory safety instruction issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nThis directive requires owners and operators of **De Havilland DH 104 \"Dove\" series aeroplanes** to inspect the aileron control cables for a specific problem: crossed cables.\n\n**Who it affects:**\n- Anyone who owns or operates a DH 104 Dove aircraft (all models)\n- Maintenance engineers working on these aircraft\n\n**When you must comply:**\nEvery time the aileron control circuit is \"disturbed\" — meaning whenever maintenance work is done that affects the aileron controls (such as repairs, replacements, or adjustments).\n\n**Why it matters:**\nCrossed aileron cables are dangerous because they reverse the pilot's control inputs (pushing the control stick left would make the plane roll right, and vice versa). This could cause loss of control during flight. The directive references a specific technical document (De Havilland TNS CT(104) No. 171) that presumably contains the detailed inspection procedure.\n\n**In short:** If you work on the aileron controls of a DH 104 Dove, you must check that the cables aren't crossed before the aircraft flies again."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The source provides a single, conditional inspection requirement that applies to all DH 104 models and refers to De Havilland TNS CT(104) No. 171 for procedure. The text does not indicate any change from a prior scope or a modification of original applicability; it sets the scope as all models and triggers inspections when the aileron control circuit is disturbed (Applicability; Compliance; Document)."},"complexity_factors":["Conditional (event-driven) compliance trigger rather than a regular schedule — inspectors must identify when the aileron control circuit has been \"disturbed\" (Compliance).","Applicability to all DH 104 (Dove) models expands operational coverage (Applicability: \"All models\").","Reliance on an external technical document (De Havilland TNS CT(104) No. 171) for the detailed inspection procedure (Document).","Potential ambiguity in the word \"disturbed\" creates implementation discretion for maintenance staff and possible enforcement variability (Compliance).","Enforcement sits within the Part 39 airworthiness directive framework under the Civil Aviation Safety Authority, so compliance is regulator-backed (header)."],"plain_english_summary":"This airworthiness directive requires owners, operators and maintenance organisations of De Havilland DH 104 (Dove) aircraft to inspect for crossed aileron control cables whenever the aileron control circuit is disturbed, using the procedure in De Havilland TNS CT(104) No. 171. It matters because the event‑driven trigger (not calendar‑based) shifts inspection costs and discretion to operators and maintenance staff and may create ambiguity over what counts as a “disturbance.”"}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-104-13-crossed-aileron-control-cables-inspection","history":"/api/acts/ad-dh-104-13-crossed-aileron-control-cables-inspection/history","analysis":"/api/acts/ad-dh-104-13-crossed-aileron-control-cables-inspection/analysis","conflicts":"/api/acts/ad-dh-104-13-crossed-aileron-control-cables-inspection/conflicts","importantCases":"/api/acts/ad-dh-104-13-crossed-aileron-control-cables-inspection/important-cases","documents":"/api/acts/ad-dh-104-13-crossed-aileron-control-cables-inspection/documents"}}