{"id":"F2007L04747","name":"AD/RYAN/2 - Seat Restraint Installations - Modifications - CANCELLED","slug":"ad-ryan-2-seat-restraint-installations-modifications-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":71255,"registerId":"commonwealth-F2007L04747-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Ryan ST Series Aeroplanes","sectionType":"division","heading":"Ryan ST Series Aeroplanes","content":"### Ryan ST Series Aeroplanes\n\n| AD/RYAN/2 | Seat Restraint Installations - Modifications | 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 This AD has been replaced by AD/GENERAL/74 Amendment 1.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/RYAN/2","sectionType":"part","heading":"AD/RYAN/2","content":"## AD/RYAN/2","sortOrder":1},{"sectionNumber":"Seat Restraint Installations - Modificat","sectionType":"part","heading":"Seat Restraint Installations - Modifications","content":"## Seat Restraint Installations - Modifications","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":2108},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"Originally issued in 1972 to mandate physical modifications (installation of upper torso restraints) to Ryan ST aircraft, this instrument has been completely cancelled. Its regulatory scope has shifted from imposing mandatory safety equipment requirements to having no operative effect, with those obligations transferred to a general airworthiness directive covering multiple aircraft types."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic, exceptions, or cross-referenced operative provisions","Substantive content is approximately 30 words"],"plain_english_summary":"**What this does:** This document cancels a previous aircraft safety rule about seatbelts for Ryan ST series aeroplanes.\n\n**Who it affects:** Owners and operators of Ryan ST series aircraft (a type of vintage light aircraft).\n\n**What it means:**\n- A **1972 rule** that required shoulder harnesses (upper torso restraints) in these aircraft is now **cancelled**.\n- The cancellation took effect on **17 January 2008**.\n- The safety requirements haven't disappeared—they've been moved to a general rule covering multiple aircraft types (**AD/GENERAL/74 Amendment 1**).\n- If you own one of these planes, you no longer need to follow this specific document; check the general directive instead for harness requirements."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ryan-2-seat-restraint-installations-modifications-cancelled","history":"/api/acts/ad-ryan-2-seat-restraint-installations-modifications-cancelled/history","analysis":"/api/acts/ad-ryan-2-seat-restraint-installations-modifications-cancelled/analysis","conflicts":"/api/acts/ad-ryan-2-seat-restraint-installations-modifications-cancelled/conflicts","importantCases":"/api/acts/ad-ryan-2-seat-restraint-installations-modifications-cancelled/important-cases","documents":"/api/acts/ad-ryan-2-seat-restraint-installations-modifications-cancelled/documents"}}