{"id":"F2007L04789","name":"AD/DHC-6/34 - Pilot Seats Safety Restraint Installations - Modification - CANCELLED","slug":"ad-dhc-6-34-pilot-seats-safety-restraint-installations-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":71325,"registerId":"commonwealth-F2007L04789-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"DHC-6 (Twin Otter) Series Aeroplanes","sectionType":"division","heading":"DHC-6 (Twin Otter) Series Aeroplanes","content":"### DHC-6 (Twin Otter) Series Aeroplanes\n\n| AD/DHC-6/34 | Pilot Seats Safety RestraintInstallations - 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 This AD has been replaced by AD/GENERAL/74 Amendment 1.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/DHC-6/34","sectionType":"part","heading":"AD/DHC-6/34","content":"## AD/DHC-6/34","sortOrder":1},{"sectionNumber":"Pilot Seats Safety RestraintInstallation","sectionType":"part","heading":"Pilot Seats Safety RestraintInstallations - Modification","content":"## Pilot Seats Safety Restraint  \nInstallations - 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":2032},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the original 1972 AD rather than expanding its scope. The obligations regarding pilot seat restraints continue under a different instrument (AD/GENERAL/74), but this specific AD is nullified with no remaining effect."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic, exceptions, or procedural steps","Minimal cross-referencing (only cites the replacement AD)","Extremely short length (under 100 words of substantive content)"],"plain_english_summary":"**What this is:** A cancellation notice for an old aircraft safety rule (called an **Airworthiness Directive** or AD) that applied to de Havilland Canada DHC-6 Twin Otter aeroplanes.\n\n**What it used to require:** The original 1972 rule required owners to install upper torso restraints (shoulder harnesses) on pilot seats in these aircraft if they were certified before 1967.\n\n**What it does now:** This document officially cancels that old rule effective 17 January 2008.\n\n**Why it matters:** The old requirement hasn't disappeared entirely—it's just been moved to a newer, broader safety rule (**AD/GENERAL/74** Amendment 1) that covers multiple aircraft types. If you own a Twin Otter, you still need to comply with the shoulder harness requirement, but you now follow the newer general rule instead of this specific one."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-6-34-pilot-seats-safety-restraint-installations-modification-cancelled","history":"/api/acts/ad-dhc-6-34-pilot-seats-safety-restraint-installations-modification-cancelled/history","analysis":"/api/acts/ad-dhc-6-34-pilot-seats-safety-restraint-installations-modification-cancelled/analysis","conflicts":"/api/acts/ad-dhc-6-34-pilot-seats-safety-restraint-installations-modification-cancelled/conflicts","importantCases":"/api/acts/ad-dhc-6-34-pilot-seats-safety-restraint-installations-modification-cancelled/important-cases","documents":"/api/acts/ad-dhc-6-34-pilot-seats-safety-restraint-installations-modification-cancelled/documents"}}