{"id":"F2006B05726","name":"AD/PA-31/20 - Landing Gear Emergency Extension Operation Placard - Replacement","slug":"ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135525,"registerId":"commonwealth-F2006B05726-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/20 - Landing Gear Emergency Extension Operation Placard - Replacement","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Piper PA-31 Series Aeroplanes\n\n \n\nAD/PA-31/20 Landing Gear Emergency Extension Operation\n\nPlacard - Replacement\n\n\n10/72\n\n \n\nApplicability: Models PA-31 and PA-31-300 with S/Nos. 31-2 to 31-751, 31-753 and 754. Model PA-31P with S/Nos. 31P-1 to 31P-53.\n\n \n\nDocument: Piper SB No. 344.\n\n \n\nCompliance: Within 100 hours time in service after 31 October 1972.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1389},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive remains tightly focused on its original purpose: correcting a specific safety labelling issue for emergency landing gear procedures. There is no evidence of scope expansion beyond the original intent to mandate placard replacement on affected aircraft."},"complexity_factors":["Single compliance action (placard replacement)","Narrow applicability limited to specific aircraft models and serial number ranges","No conditional logic or nested exceptions","Direct reference to only one external technical document (Piper SB No. 344)","Clear, unambiguous compliance deadline"],"plain_english_summary":"**What this does:**\nThis directive orders owners and operators of specific Piper PA-31 aircraft to replace the existing cockpit placard (a safety instruction label) that explains how to manually extend the landing gear during an emergency. The replacement must follow the instructions in Piper Service Bulletin No. 344.\n\n**Who it affects:**\nOwners and operators of these specific aircraft:\n- **Piper PA-31 and PA-31-300** models with serial numbers 31-2 to 31-751, 31-753, and 31-754\n- **Piper PA-31P** models with serial numbers 31P-1 to 31P-53\n\n**Why it matters:**\nIncorrect or unclear emergency procedures for landing gear extension could delay a pilot's response during an in-flight emergency, potentially leading to a gear-up landing. This ensures pilots have accurate, visible instructions when hydraulic or electrical systems fail."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement","history":"/api/acts/ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement/history","analysis":"/api/acts/ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement/analysis","conflicts":"/api/acts/ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement/conflicts","importantCases":"/api/acts/ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement/important-cases","documents":"/api/acts/ad-pa-31-20-landing-gear-emergency-extension-operation-placard-replacement/documents"}}