{"id":"F2006B05698","name":"AD/PA-31/111 - Hydraulic Hose","slug":"ad-pa-31-111-hydraulic-hose","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135497,"registerId":"commonwealth-F2006B05698-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/111 - Hydraulic Hose","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-31/111 Hydraulic Hose 6/86 DM\n\nApplicability: All models listed in the Requirement Document. Requirement: Action in accordance with Piper Service Bulletin No. 822. Compliance:               Within 25 hours time in service after 19 May 1986.\n\nBackground: A group of hydraulic hoses were manufactured using material that does not meet the pressure requirements for operation in the aircraft hydraulic system.\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":1420},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope addressing a specific manufacturing defect in hydraulic hoses for Piper PA-31 aircraft. There is no evidence of scope expansion beyond the initial safety issue identified in 1986."},"complexity_factors":["Single, specific technical requirement","No defined terms or interpretation section","Only external reference is to manufacturer service bulletin (no complex legislative cross-referencing)","Clear, unambiguous compliance deadline (25 hours time in service)","Extremely short length (under 150 words of substantive content)"],"plain_english_summary":"**What this means for aircraft owners:** If you operate a Piper PA-31 series aircraft, you must inspect and potentially replace specific hydraulic hoses in your plane's control system.\n\n**The problem:** Some hydraulic hoses were manufactured with material that cannot withstand the normal operating pressure of the aircraft's hydraulic system. This creates a risk of hose failure and potential loss of hydraulic control.\n\n**What you must do:**\n- Follow the instructions in **Piper Service Bulletin No. 822** (a manufacturer-issued technical directive)\n- Complete the required action within **25 hours of flight time** after 19 May 1986\n\n**Who this affects:** All Piper PA-31 model aircraft listed in the referenced Requirement Document (associated with the Service Bulletin).\n\n**Why it matters:** This is a mandatory safety directive issued by the Civil Aviation Safety Authority. Non-compliance breaches civil aviation regulations and creates serious flight safety risks."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-111-hydraulic-hose","history":"/api/acts/ad-pa-31-111-hydraulic-hose/history","analysis":"/api/acts/ad-pa-31-111-hydraulic-hose/analysis","conflicts":"/api/acts/ad-pa-31-111-hydraulic-hose/conflicts","importantCases":"/api/acts/ad-pa-31-111-hydraulic-hose/important-cases","documents":"/api/acts/ad-pa-31-111-hydraulic-hose/documents"}}