{"id":"F2007L04778","name":"AD/MCH/1 - Seat Restraint Installation - Modification - CANCELLED","slug":"ad-mch-1-seat-restraint-installation-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":71314,"registerId":"commonwealth-F2007L04778-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Aero Resources J2 Series Gyroplanes","sectionType":"division","heading":"Aero Resources J2 Series Gyroplanes","content":"### Aero Resources J2 Series Gyroplanes\n\n| AD/MCH/1 | 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 1973 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 This AD has been replaced by AD/GENERAL/74 Amendment 1.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/MCH/1","sectionType":"part","heading":"AD/MCH/1","content":"## AD/MCH/1","sortOrder":1},{"sectionNumber":"Seat Restraint Installation - Modificati","sectionType":"part","heading":"Seat Restraint Installation - Modification","content":"## 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":2111},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"Originally, this legislation imposed a specific equipment mandate on a narrow class of vintage aircraft (pre-1967 Aero Resources J2 Series Gyroplanes). This version eliminates that specific requirement and consolidates it into a general airworthiness directive applicable to all aircraft, shifting from targeted regulation to broad, universal coverage."},"complexity_factors":["Single, unambiguous cancellation provision","No conditional language, exceptions, or procedural steps","Only one cross-reference (to the replacement directive)","Document consists primarily of metadata and a one-line cancellation statement"],"plain_english_summary":"This document cancels a specific old aviation safety rule. **What it was:** Originally issued in 1973, the rule required owners of certain small helicopters (Aero Resources J2 Series Gyroplanes) certified before 1967 to install upper torso restraints (shoulder harnesses) to protect occupants during crashes. **What changed:** As of 17 January 2008, this specific rule is officially cancelled. **Why it matters:** The safety requirement still exists, but is now covered by a broader, general rule (AD/GENERAL/74) that applies to all aircraft types. Owners of these vintage gyroplanes no longer need to follow this specific directive, but must comply with the general replacement rule instead."}},"importantCases":[],"_links":{"self":"/api/acts/ad-mch-1-seat-restraint-installation-modification-cancelled","history":"/api/acts/ad-mch-1-seat-restraint-installation-modification-cancelled/history","analysis":"/api/acts/ad-mch-1-seat-restraint-installation-modification-cancelled/analysis","conflicts":"/api/acts/ad-mch-1-seat-restraint-installation-modification-cancelled/conflicts","importantCases":"/api/acts/ad-mch-1-seat-restraint-installation-modification-cancelled/important-cases","documents":"/api/acts/ad-mch-1-seat-restraint-installation-modification-cancelled/documents"}}