{"id":"F2006B05730","name":"AD/PA-31/25 Amdt 1 - Control Shaft Collar - Modification","slug":"ad-pa-31-25-amdt-1-control-shaft-collar-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135532,"registerId":"commonwealth-F2006B05730-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/25 Amdt 1 - Control Shaft Collar - 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-31/25\n\nAmdt 1\n\n\nControl Shaft Collar - Modification 1/76\n\n \n\nApplicability: Models PA-31-300, PA-31-310 and PA-31-325 with S/Nos. 31-2 to 31-7612009.\n\nModel PA-31-350 with S/Nos. 31-5001 to 31-7652018. Model PA-31P with S/Nos. 31P-1 to 31P- 7630001 and 31P-7630003. Model PA-31T with S/Nos. 31T-7400002 to 31T-7620002, 31T-7620004. 31T-7620005 and 31T-7620007.\n\n \n\nDocument: Piper SB No. 487.\n\n \n\nCompliance: Within 100 hours time in service after 30 January 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\na\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":1972},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"As Amendment 1, this maintains the original scope of requiring control shaft collar modifications on the specified PA-31 aircraft. The amendment likely updates administrative references or serial number listings without expanding the substantive safety requirement or applicability."},"complexity_factors":["Extremely short instrument (single page)","Single compliance action referencing one external technical document (Piper SB 487)","Clear applicability limited to enumerated aircraft models and serial number ranges","No conditional exceptions, defined terms, or nested legislative cross-references"],"plain_english_summary":"This AD mandates modifying the control shaft collar on specified Piper PA‑31 series aircraft (Navajo, Chieftain, Mojave, etc., as listed by serial number) per Piper Service Bulletin No. 487. It affects owners and operators of those aircraft.\n\nThe modification corrects a safety defect that could allow collar failure or disconnection and impair flight controls. Compliance was required within 100 flight hours after 30 January 1976."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-25-amdt-1-control-shaft-collar-modification","history":"/api/acts/ad-pa-31-25-amdt-1-control-shaft-collar-modification/history","analysis":"/api/acts/ad-pa-31-25-amdt-1-control-shaft-collar-modification/analysis","conflicts":"/api/acts/ad-pa-31-25-amdt-1-control-shaft-collar-modification/conflicts","importantCases":"/api/acts/ad-pa-31-25-amdt-1-control-shaft-collar-modification/important-cases","documents":"/api/acts/ad-pa-31-25-amdt-1-control-shaft-collar-modification/documents"}}