{"id":"F2006B08855","name":"AD/DH 104/11 - Engine Instrument Arrangement - Modification","slug":"ad-dh-104-11-engine-instrument-arrangement-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52054,"registerId":"commonwealth-F2006B08855-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 104/11 - Engine Instrument Arrangement - 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)  DH 104 (Dove) Series Aeroplanes\n\n \n\nAD/DH 104/11 Engine Instrument Arrangement - Modification 8/71\n\nApplicability: All models.\n\n \n\nDocument: 1. De Havilland Dove Mod. No. 879, Part B; or 2. ANO 105.1.14.13.5.9.\n\nCompliance: Before 1 September 1971.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":3034},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains tightly focused on its original purpose: a specific airframe modification for the DH 104 Dove type. No evidence of scope creep or expansion into broader operational requirements."},"complexity_factors":["Extremely brief text with a single unconditional mandate","No defined terms or interpretation clauses","Incorporation by reference of external technical documents (De Havilland Mod No. 879) without summary","No exceptions, exemptions, or conditional provisions"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it requires:** Owners must modify the engine instrument arrangement on all De Havilland DH 104 Dove aircraft to comply with De Havilland Modification No. 879 Part B (or an equivalent Airworthiness Notice) before 1 September 1971.\n\n**Who it affects:** Operators and owners of DH 104 Dove series aeroplanes.\n\n**Why it matters:** This is a hard legal deadline. Once 1 September 1971 passed, it became illegal to fly these aircraft without this specific instrument modification. The directive incorporates technical standards by reference, meaning the law adopts the manufacturer's engineering specifications without reproducing them in full."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-104-11-engine-instrument-arrangement-modification","history":"/api/acts/ad-dh-104-11-engine-instrument-arrangement-modification/history","analysis":"/api/acts/ad-dh-104-11-engine-instrument-arrangement-modification/analysis","conflicts":"/api/acts/ad-dh-104-11-engine-instrument-arrangement-modification/conflicts","importantCases":"/api/acts/ad-dh-104-11-engine-instrument-arrangement-modification/important-cases","documents":"/api/acts/ad-dh-104-11-engine-instrument-arrangement-modification/documents"}}