{"id":"F2008L01857","name":"AD/PA-23/23 - Rudder Tab Horn Bolt - Replacement - CANCELLED","slug":"ad-pa-23-23-rudder-tab-horn-bolt-replacement-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74059,"registerId":"commonwealth-F2008L01857-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-23 (Apache and Aztec) Series Ae","sectionType":"division","heading":"Piper PA-23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-23/23 | Rudder Tab Horn Bolt - Replacement | 7/2008 |\n| ----------- | ---------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                 |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 3 July 2008.                                                                                                                                                                       |\n| Background:  | This Directive was based on Piper Service Bulletin No. 196 calling for once-only replacement of a bolt in 1960. As all affected aircraft would have been modified long ago, this AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n7 May 2008","sortOrder":0},{"sectionNumber":"AD/PA-23/23","sectionType":"part","heading":"AD/PA-23/23","content":"## AD/PA-23/23","sortOrder":1},{"sectionNumber":"Rudder Tab Horn Bolt - Replacement","sectionType":"part","heading":"Rudder Tab Horn Bolt - Replacement","content":"## Rudder Tab Horn Bolt - Replacement","sortOrder":2},{"sectionNumber":"7/2008","sectionType":"part","heading":"7/2008","content":"## 7/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1605},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument serves exclusively to revoke a previous directive. Its scope is limited to cancellation and has not expanded beyond this single purpose."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic, exceptions, or cross-references to other legislation","Extremely short length (under 200 words)","Only two operative facts: the cancellation and the rationale"],"plain_english_summary":"This document **cancels** an old aircraft safety rule that required owners of Piper PA-23 Apache and Aztec aeroplanes to replace a specific bolt in the rudder assembly (the \"rudder tab horn bolt\").\n\n**Who is affected**\nOwners and operators of Piper PA-23 series aircraft.\n\n**What it does**\nThe original safety directive (based on a 1960 manufacturer service bulletin) required a one-time replacement of a bolt for flight safety reasons. Because all affected aircraft would have completed this modification decades ago, the Civil Aviation Safety Authority has cancelled the rule as redundant.\n\n**Why it matters**\nThis removes an obsolete maintenance requirement, reducing paperwork for aircraft operators while confirming the safety issue has been resolved fleet-wide."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-23-rudder-tab-horn-bolt-replacement-cancelled","history":"/api/acts/ad-pa-23-23-rudder-tab-horn-bolt-replacement-cancelled/history","analysis":"/api/acts/ad-pa-23-23-rudder-tab-horn-bolt-replacement-cancelled/analysis","conflicts":"/api/acts/ad-pa-23-23-rudder-tab-horn-bolt-replacement-cancelled/conflicts","importantCases":"/api/acts/ad-pa-23-23-rudder-tab-horn-bolt-replacement-cancelled/important-cases","documents":"/api/acts/ad-pa-23-23-rudder-tab-horn-bolt-replacement-cancelled/documents"}}