{"id":"F2008L01106","name":"AD/CESSNA 337/3 - Open Wire Aerial Installation - Modification - CANCELLED","slug":"ad-cessna-337-3-open-wire-aerial-installation-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":73265,"registerId":"commonwealth-F2008L01106-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 337 Series Aeroplanes","sectionType":"division","heading":"Cessna 337 Series Aeroplanes","content":"### Cessna 337 Series Aeroplanes\n\n| AD/CESSNA 337/3 | Open Wire Aerial Installation - Modification | 5/2008 |\n| --------------- | -------------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                     |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 8 May 2008.                                                                                                                                                                                                                                                                            |\n| Background:  | This unique Australian airworthiness directive (AD), issued in 1966, required a modification to re-rig aerials to remove any side load from the mast. The compliance of the AD was within 300 hours after 15 August 1966. As all aircraft would have now been modified, the unsafe condition no longer exists. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n25 March 2008","sortOrder":0},{"sectionNumber":"AD/CESSNA 337/3","sectionType":"part","heading":"AD/CESSNA 337/3","content":"## AD/CESSNA 337/3","sortOrder":1},{"sectionNumber":"Open Wire Aerial Installation - Modifica","sectionType":"part","heading":"Open Wire Aerial Installation - Modification","content":"## Open Wire Aerial Installation - Modification","sortOrder":2},{"sectionNumber":"5/2008","sectionType":"part","heading":"5/2008","content":"## 5/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2337},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the airworthiness directive entirely rather than expanding its regulatory scope. The original safety mandate has been satisfied across the fleet through historical compliance, making revocation appropriate."},"complexity_factors":["Single operative provision (the cancellation)","No defined terms, cross-references, or conditional clauses","Background information is explanatory narrative rather than legislative text","Document contains fewer than 100 words of substantive legal content"],"plain_english_summary":"This document officially **cancels an obsolete aviation safety rule** that applied to Cessna 337 series aircraft (twin-engine push-pull aeroplanes).\n\n**What the old rule required**\nThe original directive, issued in 1966, required owners to modify how open-wire radio aerials (antennas) were installed. The change prevented sideways forces (side loads) from damaging the aerial mast.\n\n**Why it is being cancelled**\nAll affected aircraft had to comply within 300 flying hours after August 1966. Because that deadline passed over 40 years ago, every plane has long since been modified. The Civil Aviation Safety Authority (CASA) has confirmed that the unsafe condition no longer exists, so the rule is unnecessary.\n\n**What this means**\nOwners and operators of Cessna 337 aircraft no longer need to track this directive. The required modification should already be installed, and there is no ongoing compliance obligation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-337-3-open-wire-aerial-installation-modification-cancelled","history":"/api/acts/ad-cessna-337-3-open-wire-aerial-installation-modification-cancelled/history","analysis":"/api/acts/ad-cessna-337-3-open-wire-aerial-installation-modification-cancelled/analysis","conflicts":"/api/acts/ad-cessna-337-3-open-wire-aerial-installation-modification-cancelled/conflicts","importantCases":"/api/acts/ad-cessna-337-3-open-wire-aerial-installation-modification-cancelled/important-cases","documents":"/api/acts/ad-cessna-337-3-open-wire-aerial-installation-modification-cancelled/documents"}}