{"id":"F2006B05891","name":"AD/PA-34/20 - Pneumatic De-Icer Tubing - Inspection","slug":"ad-pa-34-20-pneumatic-de-icer-tubing-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135939,"registerId":"commonwealth-F2006B05891-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-34/20 - Pneumatic De-Icer Tubing - Inspection","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-34 (Seneca) Series Aeroplanes\n\n \n\nAD/PA-34/20 Pneumatic De-Icer Tubing - Inspection 4/76\n\nApplicability: Model PA-34-200T with S/Nos. 34-7570001 to 34-7570287 fitted with pneumatic de- icer system.\n\n \n\nDocument: Piper SB No. 491.\n\n \n\nCompliance: Within 100 hours time in service after 31 May 1976.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1527},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains narrowly focused on its original purpose: requiring inspection of pneumatic de-icer tubing on specific Piper aircraft. There is no evidence of scope creep or expansion beyond this specific safety issue."},"complexity_factors":["Very short document (single page)","Limited applicability (specific aircraft model and serial number range)","Single compliance requirement with clear deadline","No cross-references to other legislation beyond one service bulletin","No conditional logic or exceptions"],"plain_english_summary":"**What this does:** This is a mandatory safety inspection order for specific Piper PA-34 (Seneca) aircraft. It requires owners or operators to check the pneumatic de-icer tubing (the rubber tubes that inflate to break ice off the wings) for defects.\n\n**Who it affects:** Owners and operators of Piper PA-34-200T model aircraft with serial numbers between 34-7570001 and 34-7570287 that have pneumatic de-icing systems installed.\n\n**What you must do:** Inspect the de-icer tubing following the procedures in Piper Service Bulletin No. 491. This must be done within 100 hours of flight time after 31 May 1976.\n\n**Why it matters:** Faulty de-icer tubing can fail in icing conditions, potentially leading to dangerous ice buildup on the aircraft wings and loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-34-20-pneumatic-de-icer-tubing-inspection","history":"/api/acts/ad-pa-34-20-pneumatic-de-icer-tubing-inspection/history","analysis":"/api/acts/ad-pa-34-20-pneumatic-de-icer-tubing-inspection/analysis","conflicts":"/api/acts/ad-pa-34-20-pneumatic-de-icer-tubing-inspection/conflicts","importantCases":"/api/acts/ad-pa-34-20-pneumatic-de-icer-tubing-inspection/important-cases","documents":"/api/acts/ad-pa-34-20-pneumatic-de-icer-tubing-inspection/documents"}}