{"id":"F2008L02487","name":"AD/PA-31/20 - Landing Gear Emergency Extension Operation Placard - Replacement - CANCELLED","slug":"ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74434,"registerId":"commonwealth-F2008L02487-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series Aeroplanes","content":"### Piper PA-31 Series Aeroplanes\n\n| AD/PA-31/20 | Landing Gear Emergency ExtensionOperation Placard - Replacement | 8/2008 |\n| ----------- | --------------------------------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                             |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 31 July 2008.                                                                                                                                                                                                                                                  |\n| Background:  | This unique Australian AD required once-only replacement of the landing gear emergency extension operation placard in accordance with Piper SB No. 344. The AD required compliance within 100 hours TIS after October 1972 so all affected aircraft would have been modified long ago. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n13 June 2008","sortOrder":0},{"sectionNumber":"AD/PA-31/20","sectionType":"part","heading":"AD/PA-31/20","content":"## AD/PA-31/20","sortOrder":1},{"sectionNumber":"Landing Gear Emergency ExtensionOperatio","sectionType":"part","heading":"Landing Gear Emergency ExtensionOperation Placard - Replacement","content":"## Landing Gear Emergency Extension  \nOperation Placard - Replacement","sortOrder":2},{"sectionNumber":"8/2008","sectionType":"part","heading":"8/2008","content":"## 8/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2972},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The instrument has been entirely cancelled, eliminating all operative requirements. Originally intended to mandate a physical safety modification (placard replacement) for specific aircraft, the scope has been reduced to zero after compliance was achieved across the fleet."},"complexity_factors":["Single sentence operative requirement: 'CANCELLED'","No active legal obligations remaining","No defined terms, cross-references to legislation, or conditional logic","Only one technical abbreviation (TIS - Time In Service) explained in plain English in the background section","Document functions purely as a historical record of the cancellation"],"plain_english_summary":"**What this was:** An aviation safety rule (called an Airworthiness Directive) that required owners of Piper PA-31 series aircraft to replace a specific safety label inside the cockpit.\n\n**What it did:** The rule mandated replacing the \"landing gear emergency extension operation placard\" — a label that tells pilots how to manually lower the wheels if the normal system fails. Owners had to follow instructions in Piper Service Bulletin No. 344 and complete the work within 100 flight hours after October 1972.\n\n**Current status:** **Cancelled.** This rule was officially cancelled on 31 July 2008. It became unnecessary because all affected aircraft were modified decades ago (the compliance deadline was back in 1972/1973).\n\n**Why it matters:** This document shows how aviation safety rules are cleaned up after they've done their job. Rather than leaving obsolete rules on the books, authorities cancel them once universal compliance is achieved."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement-cancelled","history":"/api/acts/ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement-cancelled/history","analysis":"/api/acts/ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement-cancelled/important-cases","documents":"/api/acts/ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement-cancelled/documents"}}