{"id":"F2009L00876","name":"AD/PA-42/13 Amdt 1 - Main Landing Gear Forward Side Brace - CANCELLED","slug":"ad-pa-42-13-amdt-1-main-landing-gear-forward-side-brace-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78145,"registerId":"commonwealth-F2009L00876-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-42 (Cheyenne III) Series Aeropl","sectionType":"division","heading":"Piper PA-42 (Cheyenne III) Series Aeroplanes","content":"### Piper PA-42 (Cheyenne III) Series Aeroplanes\n\n| AD/PA-42/13 Amdt 1 | Main Landing Gear Forward Side Brace | 4/2009 |\n| ------------------ | ------------------------------------ | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                             |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n|              | This AD is cancelled on 9 April 2009.                                                                                                                                                                                                                                                                  |\n| Background:  | This unique Australian AD specified inspection of MLG forward side bracesP/N 57448-02/-03 at 50 hour intervals until reaching 800 hours component time in service when these parts must be replaced by P/N 85165-02/-03. The requirement document was Piper SB No. 841A. The AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n25 February 2009","sortOrder":0},{"sectionNumber":"AD/PA-42/13 Amdt 1","sectionType":"part","heading":"AD/PA-42/13 Amdt 1","content":"## AD/PA-42/13 Amdt 1","sortOrder":1},{"sectionNumber":"Main Landing Gear Forward Side Brace","sectionType":"part","heading":"Main Landing Gear Forward Side Brace","content":"## Main Landing Gear Forward Side Brace","sortOrder":2},{"sectionNumber":"4/2009","sectionType":"part","heading":"4/2009","content":"## 4/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1816},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the scope of the previous Airworthiness Directive rather than expanding it. The cancellation removes all ongoing obligations regarding the specified landing gear components, reducing regulatory requirements to nil."},"complexity_factors":["Single operative provision cancelling all previous requirements","No defined terms or interpretation sections","No cross-references to other legislative provisions","No conditional logic, exceptions, or procedural steps"],"plain_english_summary":"**What this does:** This document officially cancels a previous aircraft safety rule (called an Airworthiness Directive) that applied to Piper PA-42 Cheyenne III aeroplanes.\n\n**What it cancelled:** The previous rule required owners and operators to inspect the main landing gear forward side braces every 50 flight hours. Once those parts reached 800 hours of total flying time, they had to be replaced with updated part numbers.\n\n**Why it matters:** As of 9 April 2009, aircraft owners are no longer legally required to perform these specific inspections or replacements. The safety directive has been withdrawn because it is no longer considered necessary (likely because the problematic parts have been phased out of service or alternative safety measures now apply).\n\n**Who it affects:** Owners and operators of Piper PA-42 (Cheyenne III) series aircraft who were previously following these maintenance requirements."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-42-13-amdt-1-main-landing-gear-forward-side-brace-cancelled","history":"/api/acts/ad-pa-42-13-amdt-1-main-landing-gear-forward-side-brace-cancelled/history","analysis":"/api/acts/ad-pa-42-13-amdt-1-main-landing-gear-forward-side-brace-cancelled/analysis","conflicts":"/api/acts/ad-pa-42-13-amdt-1-main-landing-gear-forward-side-brace-cancelled/conflicts","importantCases":"/api/acts/ad-pa-42-13-amdt-1-main-landing-gear-forward-side-brace-cancelled/important-cases","documents":"/api/acts/ad-pa-42-13-amdt-1-main-landing-gear-forward-side-brace-cancelled/documents"}}