{"id":"F2009L04216","name":"AD/CESSNA 150/50 - Rudder Limit Stops - CANCELLED","slug":"ad-cessna-150-50-rudder-limit-stops-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":81898,"registerId":"commonwealth-F2009L04216-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 150, F150, 152 & F152 Series Aero","sectionType":"division","heading":"Cessna 150, F150, 152 & F152 Series Aeroplanes","content":"### Cessna 150, F150, 152 & F152 Series Aeroplanes\n\n| AD/CESSNA 150/50 | Rudder Limit Stops | 23/2009 |\n| ---------------- | ------------------ | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                          |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 11 December 2009.                                                                                                                                                                                                                           |\n| Background:  | A State of Design airworthiness directive issued on or after 1st October 2009 is defined as an airworthiness directive per CASR Part 39.001A. The requirements of this airworthiness directive have been superseded by FAA AD 2009-10-09 R1 issued 27 October 2009. |\n\n![](image.001.png)\n\nWilliam David  \nDelegate of the Civil Aviation Safety Authority\n\n11 November 2009","sortOrder":0},{"sectionNumber":"AD/CESSNA 150/50","sectionType":"part","heading":"AD/CESSNA 150/50","content":"## AD/CESSNA 150/50","sortOrder":1},{"sectionNumber":"Rudder Limit Stops","sectionType":"part","heading":"Rudder Limit Stops","content":"## Rudder Limit Stops","sortOrder":2},{"sectionNumber":"23/2009","sectionType":"part","heading":"23/2009","content":"## 23/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1208},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument does not expand or alter scope; it terminates the regulatory requirement entirely. The cancellation reflects a transition to reliance on the foreign (US FAA) airworthiness directive rather than maintaining a separate Australian mandate."},"complexity_factors":["Single-issue cancellation notice with no operative provisions","No defined terms or interpretation section","Minimal cross-referencing (only mentions CASR Part 39.001A and FAA AD 2009-10-09 R1)","No conditional logic, exceptions, or procedural requirements","Extremely brief document (under 200 words of substantive text)"],"plain_english_summary":"**What this is:** This document cancels a previous safety rule (Airworthiness Directive AD/CESSNA 150/50) that applied to specific Cessna aircraft models.\n\n**Who it affects:** Owners and operators of Cessna 150, F150, 152, and F152 series aeroplanes.\n\n**What it does:** It officially cancels the Australian airworthiness directive that previously required inspections or modifications to **rudder limit stops** (safety devices that restrict how far the rudder can move) on these aircraft.\n\n**Why it matters:** The rule is no longer needed because the United States aviation safety regulator (FAA) issued a replacement directive (FAA AD 2009-10-09 R1) that supersedes the Australian requirements. Under Australian aviation law (Civil Aviation Safety Regulations Part 39), foreign airworthiness directives issued after 1 October 2009 automatically apply in Australia, making this separate Australian directive redundant."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-150-50-rudder-limit-stops-cancelled","history":"/api/acts/ad-cessna-150-50-rudder-limit-stops-cancelled/history","analysis":"/api/acts/ad-cessna-150-50-rudder-limit-stops-cancelled/analysis","conflicts":"/api/acts/ad-cessna-150-50-rudder-limit-stops-cancelled/conflicts","importantCases":"/api/acts/ad-cessna-150-50-rudder-limit-stops-cancelled/important-cases","documents":"/api/acts/ad-cessna-150-50-rudder-limit-stops-cancelled/documents"}}