{"id":"F2006B05996","name":"AD/PA-42/6 - Aileron Trim Tab Control Tube and Rudder Trim Cable Retainer Hardware - Inspection and Replacement","slug":"f2006b05996","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":322668,"registerId":"commonwealth-F2006B05996-current","compilationNumber":null,"startDate":"2026-04-08","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-42/6 - Aileron Trim Tab Control Tube and Rudder Trim Cable Retainer Hardware - Inspection and 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-42 (Cheyenne III) Series Aeroplanes\n\n \n\nAD/PA-42/6 Aileron Trim Tab Control Tube and Rudder Trim\n\nCable Retainer Hardware - Inspection and Replacement\n\n\n6/84\n\n \n\nApplicability: All model PA-42 with S/Nos 42-7800002 to 42-7801004 and 42-8001001 to 42-\n\n8001106.\n\n \n\nDocument: Piper S.B. 778.\n\n \n\nCompliance: Inspect before further flight, modify within 10 hours time in service after 17 May 1984.\n\n \n\nBackground:  The manufacturer reports that the listed aircraft may have been delivered with incorrect hardware (brass nuts) installed on the bolts securing the aileron trim tab control tube to the trim tab and aileron control tube link assembly and on the bolts attaching the rudder trim cable retainers.\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":923},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope, targeting only the specific hardware defect identified in the background section regarding incorrect brass nuts on the aileron and rudder trim systems of the specified aircraft models."},"complexity_factors":["Narrow applicability limited to specific aircraft serial number ranges","Single technical issue involving one type of incorrect hardware (brass nuts)","Straightforward compliance requirements with clear deadlines","Direct reference to manufacturer service bulletin (Piper S.B. 778)"],"plain_english_summary":"Owners/operators of specific Piper PA‑42 Cheyenne III serials must urgently inspect flight‑control hardware for incorrect brass nuts. If found, replace them (inspect before next flight; replace within 10 flight hours) because brass nuts can fail where steel is required, risking loss of trim or primary flight‑control authority. This Airworthiness Directive affects the listed serial-number range and addresses an immediate safety hazard."}},"importantCases":[],"_links":{"self":"/api/acts/f2006b05996","history":"/api/acts/f2006b05996/history","analysis":"/api/acts/f2006b05996/analysis","conflicts":"/api/acts/f2006b05996/conflicts","importantCases":"/api/acts/f2006b05996/important-cases","documents":"/api/acts/f2006b05996/documents"}}