{"id":"F2009L03928","name":"AD/BELL 412/19 - Emergency DC Bus Number One Feeder Circuit - CANCELLED","slug":"ad-bell-412-19-emergency-dc-bus-number-one-feeder-circuit-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":81319,"registerId":"commonwealth-F2009L03928-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron 412 Series Helic","sectionType":"division","heading":"Bell Helicopter Textron 412 Series Helicopters","content":"### Bell Helicopter Textron 412 Series Helicopters\n\n| AD/BELL 412/19 | Emergency DC Bus NumberOne Feeder Circuit | 12/2009 |\n| -------------- | ----------------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                  |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 19 November 2009.                                                                                                                   |\n| Background:  | This unique Australian AD specified once-only action in accordance with Alert SB 412-87-33 within 100 hours after March 1988. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n30 September 2009","sortOrder":0},{"sectionNumber":"AD/BELL 412/19","sectionType":"part","heading":"AD/BELL 412/19","content":"## AD/BELL 412/19","sortOrder":1},{"sectionNumber":"Emergency DC Bus NumberOne Feeder Circui","sectionType":"part","heading":"Emergency DC Bus NumberOne Feeder Circuit","content":"## Emergency DC Bus Number  \nOne Feeder Circuit","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":1535},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument achieves its sole purpose of cancelling a previous Airworthiness Directive without expanding, restricting, or otherwise altering the original scope concerning the emergency DC bus feeder circuit in Bell 412 helicopters."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","No conditional logic or exceptions","Extremely short (under 150 words of substantive content)"],"plain_english_summary":"**What this does:** This document officially cancels a previous aviation safety rule (called an Airworthiness Directive or AD) that applied to Bell 412 helicopters.\n\n**Who it affects:** Owners and operators of Bell Helicopter Textron 412 series helicopters.\n\n**What it means:**\n*   **The old rule:** Back in 1988, the Civil Aviation Safety Authority required a one-time inspection or fix of the **emergency DC bus number one feeder circuit** (part of the helicopter's electrical system) within 100 hours of flight time.\n*   **The change:** As of **19 November 2009**, that requirement is scrapped. Operators no longer need to comply with the old directive because the safety issue has been resolved or is no longer relevant.\n*   **Why it matters:** Removes an outdated compliance burden for helicopter operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-412-19-emergency-dc-bus-number-one-feeder-circuit-cancelled","history":"/api/acts/ad-bell-412-19-emergency-dc-bus-number-one-feeder-circuit-cancelled/history","analysis":"/api/acts/ad-bell-412-19-emergency-dc-bus-number-one-feeder-circuit-cancelled/analysis","conflicts":"/api/acts/ad-bell-412-19-emergency-dc-bus-number-one-feeder-circuit-cancelled/conflicts","importantCases":"/api/acts/ad-bell-412-19-emergency-dc-bus-number-one-feeder-circuit-cancelled/important-cases","documents":"/api/acts/ad-bell-412-19-emergency-dc-bus-number-one-feeder-circuit-cancelled/documents"}}