{"id":"F2007L04791","name":"AD/DHA-3/26 - Front Seat Restraint Installation - Modification - CANCELLED","slug":"ad-dha-3-26-front-seat-restraint-installation-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":71327,"registerId":"commonwealth-F2007L04791-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"DHA-3 (Drover) Series Aeroplanes","sectionType":"division","heading":"DHA-3 (Drover) Series Aeroplanes","content":"### DHA-3 (Drover) Series Aeroplanes\n\n| AD/DHA-3/26 | 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 This AD has been replaced by AD/GENERAL/74 Amendment 1.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/DHA-3/26","sectionType":"part","heading":"AD/DHA-3/26","content":"## AD/DHA-3/26","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":1574},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The original 1972 directive imposed a specific airworthiness requirement solely on DHA-3 Drover aircraft. This cancellation instrument eliminates that aircraft-specific mandate and redirects compliance to a general airworthiness directive (AD/GENERAL/74) applicable to all aircraft types. The regulatory scope shifts from specific to universal coverage, removing the Drover-specific obligation entirely."},"complexity_factors":["Single operational provision (cancellation)","No defined terms or interpretation sections","Only one cross-reference (to replacement directive AD/GENERAL/74)","No conditional language or exceptions","Document consists primarily of explanatory background"],"plain_english_summary":"**What this document does**\n\nThis officially cancels an old aviation safety rule that applied to DHA-3 Drover aircraft (a small Australian-made aeroplane from the 1950s-60s).\n\n**What was the old rule?**\n\nBack in 1972, the Civil Aviation Safety Authority required owners of Drover aircraft (certified before 1967) to install **upper torso restraints** — essentially shoulder harnesses or seatbelts — on front seats to protect pilots and passengers during crashes.\n\n**What changed?**\n\nAs of **17 January 2008**, this specific rule for Drovers no longer exists. Owners should instead follow a general safety directive called **AD/GENERAL/74 Amendment 1**, which applies to all aircraft types, not just Drovers.\n\n**Who does this affect?**\n\nOwners and operators of DHA-3 Drover series aircraft. They must now comply with the general directive rather than this specific one."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dha-3-26-front-seat-restraint-installation-modification-cancelled","history":"/api/acts/ad-dha-3-26-front-seat-restraint-installation-modification-cancelled/history","analysis":"/api/acts/ad-dha-3-26-front-seat-restraint-installation-modification-cancelled/analysis","conflicts":"/api/acts/ad-dha-3-26-front-seat-restraint-installation-modification-cancelled/conflicts","importantCases":"/api/acts/ad-dha-3-26-front-seat-restraint-installation-modification-cancelled/important-cases","documents":"/api/acts/ad-dha-3-26-front-seat-restraint-installation-modification-cancelled/documents"}}