{"id":"F2006B05764","name":"AD/PA-31/6 - Attachment Of Rudder Tab Hinge Brackets - Modification","slug":"ad-pa-31-6-attachment-of-rudder-tab-hinge-brackets-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135623,"registerId":"commonwealth-F2006B05764-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/6 - Attachment Of Rudder Tab Hinge Brackets - Modification","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-31/6  Attachment Of Rudder Tab Hinge Brackets - Modification\n\nApplicability: All models prior to S/No. 31-260. Document: Piper SL No. 512.\n\nCompliance: Within 100 hours time in service after 14 February 1969.\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\n\n2/69\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1588},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow technical scope. It addresses only the specific safety modification for rudder tab hinge brackets on early-model Piper PA-31 aircraft without expansion into broader operational or maintenance requirements."},"complexity_factors":["Single, specific technical requirement with no subsections or conditional logic","No defined terms or interpretation provisions","Limited applicability to specific aircraft serial numbers only","Straightforward compliance deadline based on flight hours"],"plain_english_summary":"**What it does:** This directive requires owners and operators of specific Piper PA-31 aircraft to carry out a mechanical modification to how the rudder tab hinge brackets are attached to the plane.\n\n**Who it affects:** Anyone operating Piper PA-31 aeroplanes with serial numbers below 31-260 (earlier production models).\n\n**What you must do:** Follow the instructions in Piper Service Letter No. 512 to modify the rudder tab hinge bracket attachment. This must be done within 100 hours of flying time after 14 February 1969.\n\n**Why it matters:** This is a safety requirement to ensure the rudder (the moving part on the tail that controls left/right direction) operates correctly and doesn't fail in flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-6-attachment-of-rudder-tab-hinge-brackets-modification","history":"/api/acts/ad-pa-31-6-attachment-of-rudder-tab-hinge-brackets-modification/history","analysis":"/api/acts/ad-pa-31-6-attachment-of-rudder-tab-hinge-brackets-modification/analysis","conflicts":"/api/acts/ad-pa-31-6-attachment-of-rudder-tab-hinge-brackets-modification/conflicts","importantCases":"/api/acts/ad-pa-31-6-attachment-of-rudder-tab-hinge-brackets-modification/important-cases","documents":"/api/acts/ad-pa-31-6-attachment-of-rudder-tab-hinge-brackets-modification/documents"}}