{"id":"F2009L03925","name":"AD/BELL 412/24 - Main Rotor Pitch Link to Pitch Horn Bolt - CANCELLED","slug":"ad-bell-412-24-main-rotor-pitch-link-to-pitch-horn-bolt-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":81310,"registerId":"commonwealth-F2009L03925-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron 412 Series Helic","sectionType":"division","heading":"Bell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 412/24 | Main Rotor Pitch Link to Pitch Horn Bolt | 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 412-89-44 within 5 hours time in service. The AD was issued in 1989 and 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 412/24","sectionType":"part","heading":"AD/BELL 412/24","content":"## AD/BELL 412/24","sortOrder":1},{"sectionNumber":"Main Rotor Pitch Link to Pitch Horn Bolt","sectionType":"part","heading":"Main Rotor Pitch Link to Pitch Horn Bolt","content":"## Main Rotor Pitch Link to Pitch Horn Bolt","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":1912},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the airworthiness directive and removes associated maintenance obligations entirely. It represents a reduction in regulatory scope rather than expansion or creep."},"complexity_factors":["Single operative provision consisting of a cancellation statement","No defined terms or interpretation section","No conditional logic, exceptions, or cross-references to other legislation","Document is primarily historical background rather than operative text"],"plain_english_summary":"**What this does:** This document officially cancels an old aviation safety rule (called an **Airworthiness Directive** or AD) that applied to Bell 412 helicopters.\n\n**The backstory:** Back in 1989, the Civil Aviation Safety Authority issued a rule requiring owners of Bell 412 helicopters to perform a one-time safety inspection on the **main rotor pitch link to pitch horn bolt** within 5 flight hours. This was to be done according to a specific manufacturer bulletin (Alert SB 412-89-44).\n\n**Who is affected:** Owners and operators of Bell 412 series helicopters. However, since the required action was a one-off task due over 20 years ago, most operators would have already completed it.\n\n**Why this matters:** It removes an obsolete requirement from the rulebooks, reducing unnecessary paperwork and compliance burdens for helicopter operators."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-412-24-main-rotor-pitch-link-to-pitch-horn-bolt-cancelled","history":"/api/acts/ad-bell-412-24-main-rotor-pitch-link-to-pitch-horn-bolt-cancelled/history","analysis":"/api/acts/ad-bell-412-24-main-rotor-pitch-link-to-pitch-horn-bolt-cancelled/analysis","conflicts":"/api/acts/ad-bell-412-24-main-rotor-pitch-link-to-pitch-horn-bolt-cancelled/conflicts","importantCases":"/api/acts/ad-bell-412-24-main-rotor-pitch-link-to-pitch-horn-bolt-cancelled/important-cases","documents":"/api/acts/ad-bell-412-24-main-rotor-pitch-link-to-pitch-horn-bolt-cancelled/documents"}}