{"id":"F2006B05634","name":"AD/PA-28/8 - Rudder Trim Installation","slug":"ad-pa-28-8-rudder-trim-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135296,"registerId":"commonwealth-F2006B05634-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/8 - Rudder Trim Installation","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-28 Series Aeroplanes\n\n \n\nAD/PA-28/8 Rudder Trim Installation 1/67\n\nApplicability: All models with S/Nos. 28-20521 to 28-22173, 28-1761 to 28-3656 and 28-10487 to\n\n28-10755.\n\n \n\nDocument: Piper SB No. 237.\n\n \n\nCompliance: Within 200 hours time in service after 15 January 1967 or before 31 March 1967 whichever occurs first.\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":1723},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is the original 1967 issue of the directive (indicated by '1/67'). It maintains a narrow, targeted scope limited to specific aircraft serial numbers requiring a single rudder trim modification. There is no evidence of expansion beyond the original safety-critical installation requirement."},"complexity_factors":["Very short length (under 100 words)","Single compliance action with no exceptions or sub-conditions","Simple alternative deadline structure (whichever occurs first)","Limited applicability restricted to three specific serial number ranges","Only one external reference (Piper SB 237) with no nested cross-references"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of specified Piper PA‑28 Cherokees (serial ranges listed) to install or modify the rudder trim per Piper Service Bulletin No. 237. Work must be completed by the earlier of 200 flight hours after 15 Jan 1967 or before 31 Mar 1967. The change restores proper rudder control and prevents loss of directional control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-8-rudder-trim-installation","history":"/api/acts/ad-pa-28-8-rudder-trim-installation/history","analysis":"/api/acts/ad-pa-28-8-rudder-trim-installation/analysis","conflicts":"/api/acts/ad-pa-28-8-rudder-trim-installation/conflicts","importantCases":"/api/acts/ad-pa-28-8-rudder-trim-installation/important-cases","documents":"/api/acts/ad-pa-28-8-rudder-trim-installation/documents"}}