{"id":"F2006B09304","name":"AD/DO-27/9 - Front Seat Restraint Installation - Modification","slug":"ad-do-27-9-front-seat-restraint-installation-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53399,"registerId":"commonwealth-F2006B09304-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DO-27/9 - Front Seat Restraint Installation -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)  Dornier DO-27 Series Aeroplanes\n\n \n\nAD/DO-27/9 Front Seat Restraint Installation - Modification NK\n\nApplicability: All models.\n\n \n\nRequirement: Modify each front seat restraint installation by fitting a safety harness in accordance with a scheme approved by the Secretary.\n\n \n\nNote: Guidelines for installation schemes are outlined in Airworthiness Advisory Circular No. 62 dated March 1972.\n\n \n\nCompliance: Before 1 October 1973.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\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":1774},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains a narrow, targeted scope specific to the Dornier DO-27 aircraft type, requiring a specific safety modification (front seat harnesses). It remains consistent with the standard purpose of airworthiness directives."},"complexity_factors":["Single, straightforward operative requirement","Minimal structure with no defined terms or cross-references to other legislation","Technical details delegated to external approval by the Secretary","Single external reference to advisory circular for non-binding guidance"],"plain_english_summary":"This directive requires owners and operators of **Dornier DO-27 aircraft** to install safety harnesses (seat belts) in the front seats.\n\n**What you must do:**\n- Fit a safety harness to each front seat restraint system\n- Use an installation plan (scheme) that has been approved by the Secretary (of the relevant government department)\n\n**Deadline:**\n- Must be completed before 1 October 1973\n\n**Guidance:**\n- Airworthiness Advisory Circular No. 62 (March 1972) provides guidelines on how to design the installation scheme, though the final plan still needs official approval.\n\nThis is a mandatory safety upgrade to better protect pilots and front-seat passengers during accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-27-9-front-seat-restraint-installation-modification","history":"/api/acts/ad-do-27-9-front-seat-restraint-installation-modification/history","analysis":"/api/acts/ad-do-27-9-front-seat-restraint-installation-modification/analysis","conflicts":"/api/acts/ad-do-27-9-front-seat-restraint-installation-modification/conflicts","importantCases":"/api/acts/ad-do-27-9-front-seat-restraint-installation-modification/important-cases","documents":"/api/acts/ad-do-27-9-front-seat-restraint-installation-modification/documents"}}