{"id":"F2008L02919","name":"AD/AC-SNOW/9 - Seat Travel Restriction - Modification - CANCELLED","slug":"ad-ac-snow-9-seat-travel-restriction-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74838,"registerId":"commonwealth-F2008L02919-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Ayres Thrush (Snow) Commander Series Aer","sectionType":"division","heading":"Ayres Thrush (Snow) Commander Series Aeroplanes","content":"### Ayres Thrush (Snow) Commander Series Aeroplanes\n\n| AD/AC-SNOW/9 | Seat Travel Restriction - Modification | 9/2008 |\n| ------------ | -------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                    |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 28 August 2008.                                                                                                                                                                                                                       |\n| Background:  | This AD, raised in 1968 required a modification to restrict seat travel in accordance with Snow Commander (Aust) Drawing No. 150. Compliance was required forthwith. As all affected aircraft would have been modified by now, this AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n18 July 2008","sortOrder":0},{"sectionNumber":"AD/AC-SNOW/9","sectionType":"part","heading":"AD/AC-SNOW/9","content":"## AD/AC-SNOW/9","sortOrder":1},{"sectionNumber":"Seat Travel Restriction - Modification","sectionType":"part","heading":"Seat Travel Restriction - Modification","content":"## Seat Travel Restriction - Modification","sortOrder":2},{"sectionNumber":"9/2008","sectionType":"part","heading":"9/2008","content":"## 9/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1606},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the regulatory requirement rather than expanding it. The directive fulfilled its original purpose (ensuring seat modifications were completed) and is now formally cancelled as spent, reducing the regulatory burden to nil."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No cross-references to other legislation","No conditional logic, exceptions, or procedural requirements","Administrative revocation of a spent requirement"],"plain_english_summary":"This document cancels an old aircraft safety rule.\n\n**What it is**\nAn Airworthiness Directive (a mandatory safety instruction for aircraft owners) cancelling a 1968 requirement that affected Ayres Thrush (Snow) Commander series aeroplanes — a type of agricultural aircraft (crop dusters).\n\n**What the old rule required**\nThe original 1968 directive required an immediate modification to restrict how far the pilot's seat could travel, based on engineering drawing No. 150.\n\n**Why it's cancelled**\nThe Civil Aviation Safety Authority determined that all affected aircraft would have been modified by now, so the mandatory instruction is no longer necessary.\n\n**What this means**\nAs of 28 August 2008, owners of these aircraft no longer need to comply with this specific directive, though any modifications already made remain in place."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-snow-9-seat-travel-restriction-modification-cancelled","history":"/api/acts/ad-ac-snow-9-seat-travel-restriction-modification-cancelled/history","analysis":"/api/acts/ad-ac-snow-9-seat-travel-restriction-modification-cancelled/analysis","conflicts":"/api/acts/ad-ac-snow-9-seat-travel-restriction-modification-cancelled/conflicts","importantCases":"/api/acts/ad-ac-snow-9-seat-travel-restriction-modification-cancelled/important-cases","documents":"/api/acts/ad-ac-snow-9-seat-travel-restriction-modification-cancelled/documents"}}