{"id":"F2009L00199","name":"AD/PA-23/67 - Throttle Control Shaft - CANCELLED","slug":"ad-pa-23-67-throttle-control-shaft-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76660,"registerId":"commonwealth-F2009L00199-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-23 (Apache and Aztec) Series Ae","sectionType":"division","heading":"Piper PA-23 (Apache and Aztec) Series Aeroplanes","content":"### Piper PA-23 (Apache and Aztec) Series Aeroplanes\n\n| AD/PA-23/67 | Throttle Control Shaft | 2/2009 |\n| ----------- | ---------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                    |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 12 February 2009.                                                                                                                                                     |\n| Background:  | This unique Australian AD specified action on the throttle control shaft in accordance with Piper SB No. 451 within 100 hours time in service after April 1975. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n23 December 2008","sortOrder":0},{"sectionNumber":"AD/PA-23/67","sectionType":"part","heading":"AD/PA-23/67","content":"## AD/PA-23/67","sortOrder":1},{"sectionNumber":"Throttle Control Shaft","sectionType":"part","heading":"Throttle Control Shaft","content":"## Throttle Control Shaft","sortOrder":2},{"sectionNumber":"2/2009","sectionType":"part","heading":"2/2009","content":"## 2/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1935},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument reduces regulatory scope by terminating a previous Airworthiness Directive. It eliminates compliance obligations rather than expanding regulatory reach."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No cross-references to other legislation","No conditional logic, exceptions, or procedural requirements"],"plain_english_summary":"This document **cancels** (revokes) a previous aviation safety rule that applied to owners and operators of **Piper PA-23 Apache and Aztec** aircraft.\n\n**Background:**\nThe original directive (issued in 1975) was an **Airworthiness Directive** (a mandatory safety notice from the aviation regulator). It required inspection or repair of the **throttle control shaft** within 100 flight hours, following the aircraft manufacturer's Service Bulletin No. 451.\n\n**What this document does:**\nIt officially cancels that safety requirement as of **12 February 2009**. Owners and operators of these aircraft are no longer required to perform this specific inspection or maintenance.\n\n**Why it matters:**\nIt removes an outdated compliance burden. The Civil Aviation Safety Authority determined the safety action is no longer necessary—likely because the affected fleet has been sufficiently modified, retired, or the original safety risk has been mitigated through other means."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-67-throttle-control-shaft-cancelled","history":"/api/acts/ad-pa-23-67-throttle-control-shaft-cancelled/history","analysis":"/api/acts/ad-pa-23-67-throttle-control-shaft-cancelled/analysis","conflicts":"/api/acts/ad-pa-23-67-throttle-control-shaft-cancelled/conflicts","importantCases":"/api/acts/ad-pa-23-67-throttle-control-shaft-cancelled/important-cases","documents":"/api/acts/ad-pa-23-67-throttle-control-shaft-cancelled/documents"}}