{"id":"F2008L00164","name":"AD/CESSNA 207/1 - Control Systems - CANCELLED","slug":"ad-cessna-207-1-control-systems-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":72330,"registerId":"commonwealth-F2008L00164-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 207 Series Aeroplanes","sectionType":"division","heading":"Cessna 207 Series Aeroplanes","content":"### Cessna 207 Series Aeroplanes\n\n| AD/CESSNA 207/1 | 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 207/1","sectionType":"part","heading":"AD/CESSNA 207/1","content":"## AD/CESSNA 207/1","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":1848},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The legislation has been completely cancelled. Originally, this instrument imposed a mandatory replacement obligation on aircraft owners to address a manufacturing defect. This version revokes that requirement entirely because the unsafe condition (faulty 1969 lock nuts) no longer exists in the aviation fleet."},"complexity_factors":["Document contains approximately 80 words of substantive legislative content","No defined terms, interpretation sections, or legal cross-references","Single unambiguous action: cancellation of previous directive","No conditional logic, exceptions, or operative provisions"],"plain_english_summary":"**What this does:**\nThis officially cancels an old aircraft safety rule (an Airworthiness Directive) that applied to Cessna 207 aeroplanes.\n\n**Background:**\nIn 1970, aviation safety regulators issued a rule requiring a one-time replacement of specific lock nuts (called NAS 679s) installed on Cessna 207 aircraft between April and November 1969. These nuts had a suspected manufacturing flaw that could affect the control systems.\n\n**Why it matters:**\nBecause this rule was issued nearly 40 years ago, authorities are confident all affected nuts have long since been replaced. The unsafe condition no longer exists, so the rule is obsolete. This cancellation removes outdated regulatory paperwork without imposing any new requirements on aircraft owners."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-207-1-control-systems-cancelled","history":"/api/acts/ad-cessna-207-1-control-systems-cancelled/history","analysis":"/api/acts/ad-cessna-207-1-control-systems-cancelled/analysis","conflicts":"/api/acts/ad-cessna-207-1-control-systems-cancelled/conflicts","importantCases":"/api/acts/ad-cessna-207-1-control-systems-cancelled/important-cases","documents":"/api/acts/ad-cessna-207-1-control-systems-cancelled/documents"}}