{"id":"F2009L03827","name":"AD/DHC-8/13 - Landing Gear Control System - CANCELLED","slug":"ad-dhc-8-13-landing-gear-control-system-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":81065,"registerId":"commonwealth-F2009L03827-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bombardier (Boeing Canada/De Havilland) ","sectionType":"division","heading":"Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes","content":"### Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes\n\n| AD/DHC-8/13 | Landing Gear Control System | 12/2009 |\n| ----------- | --------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                                 |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 19 November 2009.                                                                                                                                                                                                                                                                                  |\n| Background:  | This AD, raised 1990 against de Havilland Canada Service Bulletin (SB) 8-32-70, required a modification to preclude the possibility of erroneous nose gear position indication. Compliance was required prior to 17 August 1990.As all affected aircraft would have been modified long ago, this AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n27 September 2009","sortOrder":0},{"sectionNumber":"AD/DHC-8/13","sectionType":"part","heading":"AD/DHC-8/13","content":"## AD/DHC-8/13","sortOrder":1},{"sectionNumber":"Landing Gear Control System","sectionType":"part","heading":"Landing Gear Control System","content":"## Landing Gear Control System","sortOrder":2},{"sectionNumber":"12/2009","sectionType":"part","heading":"12/2009","content":"## 12/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1921},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument has a single, discrete purpose: to cancel Airworthiness Directive AD/DHC-8/13. Its scope remains limited to revoking the obsolete 1990 directive and has not expanded beyond that original intent."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic, exceptions, or procedural steps","Extremely brief (under 150 words of operative text)","Only cross-reference is to the specific directive being cancelled"],"plain_english_summary":"**What this does:** This officially cancels a previous aircraft safety rule (called an *Airworthiness Directive* or AD) that required owners to fix the nose gear position indicators on certain Bombardier DHC-8 aeroplanes.\n\n**Who it affects:** Owners and operators of Bombardier DHC-8 series aircraft. In practice, this affects no one today because the work required by the original 1990 rule was completed decades ago.\n\n**Why it matters:** The original 1990 directive required a specific mechanical modification to prevent pilots from receiving false signals about whether the nose landing gear was properly deployed. Since every affected aircraft was modified by the August 1990 deadline, the safety rule is now obsolete. This document formally removes the redundant requirement from the books."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-8-13-landing-gear-control-system-cancelled","history":"/api/acts/ad-dhc-8-13-landing-gear-control-system-cancelled/history","analysis":"/api/acts/ad-dhc-8-13-landing-gear-control-system-cancelled/analysis","conflicts":"/api/acts/ad-dhc-8-13-landing-gear-control-system-cancelled/conflicts","importantCases":"/api/acts/ad-dhc-8-13-landing-gear-control-system-cancelled/important-cases","documents":"/api/acts/ad-dhc-8-13-landing-gear-control-system-cancelled/documents"}}