{"id":"F2008L04464","name":"AD/BELL 412/1 - Engine Mount Fireshield - Installation - CANCELLED","slug":"ad-bell-412-1-engine-mount-fireshield-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76469,"registerId":"commonwealth-F2008L04464-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron 412 Series Helic","sectionType":"division","heading":"Bell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 412/1 | Engine Mount Fireshield - Installation | 13/2008 |\n| ------------- | -------------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                    |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 18 December 2008.                                                                                                                                                                                     |\n| Background:  | This unique Australian AD issued in 1982 required installation of a fire shield to protect the engine mount in the event of an engine fire. As all aircraft would have installed a fire shield, the AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n6 November 2008","sortOrder":0},{"sectionNumber":"AD/BELL 412/1","sectionType":"part","heading":"AD/BELL 412/1","content":"## AD/BELL 412/1","sortOrder":1},{"sectionNumber":"Engine Mount Fireshield - Installation","sectionType":"part","heading":"Engine Mount Fireshield - Installation","content":"## Engine Mount Fireshield - Installation","sortOrder":2},{"sectionNumber":"13/2008","sectionType":"part","heading":"13/2008","content":"## 13/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1573},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the original 1982 directive entirely rather than expanding or modifying its scope. The cancellation reflects universal compliance with the original safety requirement, not a policy change or scope expansion."},"complexity_factors":["Single operative provision (cancellation of previous directive)","No defined terms or interpretation section","No conditional language or exceptions","No cross-references to other legislation beyond the cancelled AD","Removes regulatory obligations rather than imposing new ones"],"plain_english_summary":"This document officially cancels a 1982 Australian airworthiness directive (AD) that required operators of Bell 412 helicopters to install fire shields around engine mounts to prevent fire damage. The Civil Aviation Safety Authority cancelled the directive effective 18 December 2008 because all affected aircraft have now been modified and comply with the original safety requirement. This means helicopter operators are no longer formally required to follow this specific directive, though the fire shields remain physically installed on the aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-412-1-engine-mount-fireshield-installation-cancelled","history":"/api/acts/ad-bell-412-1-engine-mount-fireshield-installation-cancelled/history","analysis":"/api/acts/ad-bell-412-1-engine-mount-fireshield-installation-cancelled/analysis","conflicts":"/api/acts/ad-bell-412-1-engine-mount-fireshield-installation-cancelled/conflicts","importantCases":"/api/acts/ad-bell-412-1-engine-mount-fireshield-installation-cancelled/important-cases","documents":"/api/acts/ad-bell-412-1-engine-mount-fireshield-installation-cancelled/documents"}}