{"id":"F2006B08971","name":"AD/DHA-3/15 - Rear Fuselage - Elevator Quadrant Installation - Modification","slug":"ad-dha-3-15-rear-fuselage-elevator-quadrant-installation-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52565,"registerId":"commonwealth-F2006B08971-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHA-3/15 - Rear Fuselage - Elevator Quadrant Installation - 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)  DHA-3 (Drover) Series Aeroplanes\n\n \n\nAD/DHA-3/15 Rear Fuselage - Elevator Quadrant\n\nInstallation - Modification\n\n\n9/55\n\n \n\nApplicability: All models.\n\n \n\nDocument: 1. DH TNS CT(A3) No. 100; or\n\n \n\n2. DH Modification DRO 88. Compliance: 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","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1767},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope: mandating a specific safety modification to the elevator quadrant installation of DHA-3 aircraft. There is no evidence of scope creep or expansion into unrelated operational areas."},"complexity_factors":["Single operative provision with immediate effect","No defined terms or interpretation section","No conditional triggers, exceptions, or exemptions","Universal applicability (all models) with no carve-outs","Only two external technical document references required for compliance"],"plain_english_summary":"**What this does:** This is an Airworthiness Directive—a mandatory safety order requiring owners to modify the elevator control system in the rear fuselage of DHA-3 Drover aircraft.\n\n**Who it affects:** Owners and operators of all models of the DHA-3 (Drover) series, a twin-engine utility aircraft manufactured by de Havilland Australia.\n\n**What must be done:** The elevator quadrant (a mechanical component in the tail that controls the aircraft's pitch) must be modified immediately (\"forthwith\") according to one of two technical documents:\n*   de Havilland Technical News Sheet CT(A3) No. 100; **or**\n*   de Havilland Modification DRO 88\n\n**Why it matters:** The directive addresses a specific airworthiness issue with the elevator installation. Compliance is mandatory for the aircraft to remain legally airworthy and safe to operate."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dha-3-15-rear-fuselage-elevator-quadrant-installation-modification","history":"/api/acts/ad-dha-3-15-rear-fuselage-elevator-quadrant-installation-modification/history","analysis":"/api/acts/ad-dha-3-15-rear-fuselage-elevator-quadrant-installation-modification/analysis","conflicts":"/api/acts/ad-dha-3-15-rear-fuselage-elevator-quadrant-installation-modification/conflicts","importantCases":"/api/acts/ad-dha-3-15-rear-fuselage-elevator-quadrant-installation-modification/important-cases","documents":"/api/acts/ad-dha-3-15-rear-fuselage-elevator-quadrant-installation-modification/documents"}}