{"id":"F2007L04787","name":"AD/DO-27/9 - Front Seat Restraint Installation - Modification - CANCELLED","slug":"ad-do-27-9-front-seat-restraint-installation-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":71323,"registerId":"commonwealth-F2007L04787-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Dornier DO-27 Series Aeroplanes","sectionType":"division","heading":"Dornier DO-27 Series Aeroplanes","content":"### Dornier DO-27 Series Aeroplanes\n\n| AD/DO-27/9 | Front Seat Restraint Installation - Modification | 1/2008 |\n| ---------- | ------------------------------------------------ | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                   |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 17 January 2008.                                                                                                                                     |\n| Background:  | This AD was issued in 1972 to require the installation of upper torso restraint on aircraft certified prior to 1967. This AD has been replaced by AD/GENERAL/74 Amendment 1. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n26 November 2007","sortOrder":0},{"sectionNumber":"AD/DO-27/9","sectionType":"part","heading":"AD/DO-27/9","content":"## AD/DO-27/9","sortOrder":1},{"sectionNumber":"Front Seat Restraint Installation - Modi","sectionType":"part","heading":"Front Seat Restraint Installation - Modification","content":"## Front Seat Restraint Installation - Modification","sortOrder":2},{"sectionNumber":"1/2008","sectionType":"part","heading":"1/2008","content":"## 1/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2224},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The instrument has shifted from an active mandate requiring specific safety modifications in Dornier DO-27 aircraft to a complete cancellation. The regulatory scope has effectively been transferred to a general airworthiness directive (AD/GENERAL/74) that applies broadly across multiple aircraft types rather than maintaining model-specific requirements."},"complexity_factors":["Single purpose cancellation instrument with no operative provisions","No conditional logic, exceptions, or procedural requirements","Minimal cross-referencing (only one reference to replacement directive)","Extremely brief - effectively a one-sentence cancellation","No defined terms or technical specifications"],"plain_english_summary":"This document officially cancels a 1972 aircraft safety rule that required front seat shoulder harnesses (upper torso restraints) to be installed in Dornier DO-27 series aeroplanes certified before 1967.\n\n**What this means:**\n* **Original rule:** Required safety upgrades to older aircraft to protect pilots and front passengers during crashes\n* **Current status:** As of 17 January 2008, this specific rule no longer applies to Dornier DO-27 aircraft\n* **Replacement:** The safety requirement now lives in a general airworthiness directive (**AD/GENERAL/74 Amendment 1**) that covers multiple aircraft types, rather than having separate rules for each aircraft model"}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-27-9-front-seat-restraint-installation-modification-cancelled","history":"/api/acts/ad-do-27-9-front-seat-restraint-installation-modification-cancelled/history","analysis":"/api/acts/ad-do-27-9-front-seat-restraint-installation-modification-cancelled/analysis","conflicts":"/api/acts/ad-do-27-9-front-seat-restraint-installation-modification-cancelled/conflicts","importantCases":"/api/acts/ad-do-27-9-front-seat-restraint-installation-modification-cancelled/important-cases","documents":"/api/acts/ad-do-27-9-front-seat-restraint-installation-modification-cancelled/documents"}}