{"id":"F2008L00166","name":"AD/CESSNA 206/7 - Control Systems - CANCELLED","slug":"ad-cessna-206-7-control-systems-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":72333,"registerId":"commonwealth-F2008L00166-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 206 Series Aeroplanes","sectionType":"division","heading":"Cessna 206 Series Aeroplanes","content":"### Cessna 206 Series Aeroplanes\n\n| AD/CESSNA 206/7 | Control Systems | 2/2008 |\n| --------------- | --------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                                |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 14 February 2008.                                                                                                                                                                                                                                                                                 |\n| Background:  | This is a unique Australian AD issued in 1970 requiring a once off replacement of a number of NAS 679 lock nuts installed on Cessna aircraft between April and November in 1969. These nuts were suspected to have a manufacturing flaw. As all nuts would have now been replaced, the unsafe condition no longer exists. |\n\n![](image.001.png)\n\nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n20 December 2007","sortOrder":0},{"sectionNumber":"AD/CESSNA 206/7","sectionType":"part","heading":"AD/CESSNA 206/7","content":"## AD/CESSNA 206/7","sortOrder":1},{"sectionNumber":"Control Systems","sectionType":"part","heading":"Control Systems","content":"## Control Systems","sortOrder":2},{"sectionNumber":"2/2008","sectionType":"part","heading":"2/2008","content":"## 2/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1766},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the legislation entirely rather than expanding its scope. It cancels the original 1970 Airworthiness Directive, removing all compliance obligations rather than modifying or extending them."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","No cross-references to other legislation","No conditional logic, exceptions, or transitional provisions"],"plain_english_summary":"**What this does:** This document officially cancels an old aircraft safety rule (called an *Airworthiness Directive* or AD) that applied to Cessna 206 series aeroplanes.\n\n**The old rule:** In 1970, Australia's aviation safety authority required owners to replace specific lock nuts (called NAS 679 nuts) installed on these aircraft between April and November 1969. The nuts were suspected of having a manufacturing defect that could affect control systems.\n\n**Why it matters now:** As of 14 February 2008, this maintenance requirement no longer applies. The authority determined that after 38 years, all of the faulty nuts would have been replaced during normal maintenance, meaning the unsafe condition no longer exists.\n\n**Who it affects:** Owners and operators of Cessna 206 series aircraft previously subject to the 1970 directive. They are no longer legally required to comply with this specific replacement rule."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-206-7-control-systems-cancelled","history":"/api/acts/ad-cessna-206-7-control-systems-cancelled/history","analysis":"/api/acts/ad-cessna-206-7-control-systems-cancelled/analysis","conflicts":"/api/acts/ad-cessna-206-7-control-systems-cancelled/conflicts","importantCases":"/api/acts/ad-cessna-206-7-control-systems-cancelled/important-cases","documents":"/api/acts/ad-cessna-206-7-control-systems-cancelled/documents"}}