{"id":"F2006B05732","name":"AD/PA-31/28 - Control Attachment Ball Joints - Inspection","slug":"ad-pa-31-28-control-attachment-ball-joints-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135538,"registerId":"commonwealth-F2006B05732-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/28 - Control Attachment Ball Joints - 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-31 Series Aeroplanes\n\n \n\nAD/PA-31/28 Control Attachment Ball Joints - Inspection 12/73\n\nApplicability: Models PA-31 and PA-31-300 with S/Nos. 31-2 and on. Model PA-31-350 with S/Nos. 31-5001 and on. Model PA-31P with S/Nos. 31P-1 and on.\n\n \n\nDocument: Piper SB No. 407.\n\n \n\nCompliance: Within 100 hours time in service after 31 December 1973.\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":2140},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete airworthiness directive from 1973 with a specific, limited scope. It has not expanded beyond its original purpose of mandating inspections for control attachment ball joints on specific Piper aircraft models."},"complexity_factors":["Extremely short length (approximately 100 words)","Single, unambiguous compliance requirement with clear deadline","Specific applicability limited to four aircraft models with defined serial number ranges","Defers technical inspection details to external service bulletin rather than incorporating complex procedures"],"plain_english_summary":"This Airworthiness Directive is a legally binding safety order requiring owners of specific Piper aircraft to inspect critical flight control components.\n\n**What it does**\nMandates inspection of control attachment ball joints (the pivot points that connect the pilot's controls to the aircraft's moving surfaces like ailerons and elevators) on certain Piper PA-31 series aircraft.\n\n**Who it affects**\nOwners and operators of:\n- Piper PA-31 and PA-31-300 (serial numbers 31-2 and onwards)\n- Piper PA-31-350 (serial numbers 31-5001 and onwards)\n- Piper PA-31P (serial numbers 31P-1 and onwards)\n\n**What you must do**\nComplete the inspection within 100 hours of flight time after 31 December 1973, following the procedures detailed in Piper Service Bulletin No. 407.\n\n**Why it matters**\nPrevents potential failure of flight control systems that could lead to loss of aircraft control and crashes."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-28-control-attachment-ball-joints-inspection","history":"/api/acts/ad-pa-31-28-control-attachment-ball-joints-inspection/history","analysis":"/api/acts/ad-pa-31-28-control-attachment-ball-joints-inspection/analysis","conflicts":"/api/acts/ad-pa-31-28-control-attachment-ball-joints-inspection/conflicts","importantCases":"/api/acts/ad-pa-31-28-control-attachment-ball-joints-inspection/important-cases","documents":"/api/acts/ad-pa-31-28-control-attachment-ball-joints-inspection/documents"}}