{"id":"F2008L01108","name":"AD/CESSNA 336/4 - Open Wire Aerial Installation - Modification - CANCELLED","slug":"ad-cessna-336-4-open-wire-aerial-installation-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":73270,"registerId":"commonwealth-F2008L01108-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 336 Series Aeroplanes","sectionType":"division","heading":"Cessna 336 Series Aeroplanes","content":"### Cessna 336 Series Aeroplanes\n\n| AD/CESSNA 336/4 | 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 1969. 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 336/4","sectionType":"part","heading":"AD/CESSNA 336/4","content":"## AD/CESSNA 336/4","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":973},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument simply terminates a previous airworthiness directive without expanding or altering the regulatory scope."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic, exceptions, or cross-references","Length under 150 words"],"plain_english_summary":"**What this does:** This document cancels an old aircraft safety rule that is no longer needed.\n\n**The backstory:** In 1966, aviation authorities required owners of Cessna 336 aeroplanes to modify how the aerial (antenna) wires were rigged to the mast. The goal was to remove dangerous sideways forces ('side loads') that could damage the structure. Owners had to complete this work within 300 hours of flying time after August 1969.\n\n**Why it matters:** By 2008, every affected aircraft had already made this modification, so the unsafe condition no longer exists. This document officially removes the legal requirement, tidying up the rulebook."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-336-4-open-wire-aerial-installation-modification-cancelled","history":"/api/acts/ad-cessna-336-4-open-wire-aerial-installation-modification-cancelled/history","analysis":"/api/acts/ad-cessna-336-4-open-wire-aerial-installation-modification-cancelled/analysis","conflicts":"/api/acts/ad-cessna-336-4-open-wire-aerial-installation-modification-cancelled/conflicts","importantCases":"/api/acts/ad-cessna-336-4-open-wire-aerial-installation-modification-cancelled/important-cases","documents":"/api/acts/ad-cessna-336-4-open-wire-aerial-installation-modification-cancelled/documents"}}