{"id":"F2008L01858","name":"AD/PA-23/24 - Stabilator Tab Horn - Inspection - CANCELLED","slug":"ad-pa-23-24-stabilator-tab-horn-inspection-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74061,"registerId":"commonwealth-F2008L01858-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-23 (Apache and Aztec) Series Ae","sectionType":"division","heading":"Piper PA-23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-23/24 | Stabilator Tab Horn - Inspection | 7/2008 |\n| ----------- | -------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                                         |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 3 July 2008.                                                                                                                                                                                                                                                                                               |\n| Background:  | This Directive was issued in 1971 based on Piper Service Bulletin No. 199. This called for inspection of the stabilator tab horn at each daily inspection until the aircraft was modified in accordance with SB No. 199A. As all affected aircraft would have been inspected and 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-23/24","sectionType":"part","heading":"AD/PA-23/24","content":"## AD/PA-23/24","sortOrder":1},{"sectionNumber":"Stabilator Tab Horn - Inspection","sectionType":"part","heading":"Stabilator Tab Horn - Inspection","content":"## Stabilator Tab Horn - Inspection","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":1686},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the regulatory requirements entirely rather than expanding them. It represents a complete revocation of the previous Airworthiness Directive, removing compliance obligations rather than broadening the scope of application."},"complexity_factors":["Single operative provision (cancellation of previous directive)","No defined terms or interpretation section","No conditional logic, exceptions, or triggers","Extremely short length (under 150 words of substantive content)","No cross-references to other legislation currently in force"],"plain_english_summary":"This document **cancels a previous aircraft safety rule** (called an *Airworthiness Directive* or AD) that applied to Piper PA-23 Apache and Aztec aeroplanes.\n\n**What the original rule required:**\nBack in 1971, the aviation safety authority issued a directive requiring daily inspections of the **stabilator tab horn** (a control surface component on the aircraft's tail). Owners had to keep inspecting this part until the aircraft was modified according to manufacturer instructions (Service Bulletin No. 199A).\n\n**What this document does:**\nIt officially cancels that 1971 directive effective **3 July 2008**. Because all affected aircraft would have been inspected and modified decades ago, the old rule is no longer needed.\n\n**Who this affects:**\nOwners and operators of Piper PA-23 aircraft. Practically speaking, this removes an outdated inspection requirement that no longer applies."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-24-stabilator-tab-horn-inspection-cancelled","history":"/api/acts/ad-pa-23-24-stabilator-tab-horn-inspection-cancelled/history","analysis":"/api/acts/ad-pa-23-24-stabilator-tab-horn-inspection-cancelled/analysis","conflicts":"/api/acts/ad-pa-23-24-stabilator-tab-horn-inspection-cancelled/conflicts","importantCases":"/api/acts/ad-pa-23-24-stabilator-tab-horn-inspection-cancelled/important-cases","documents":"/api/acts/ad-pa-23-24-stabilator-tab-horn-inspection-cancelled/documents"}}