{"id":"F2006B05454","name":"AD/PA-23/23 - Rudder Tab Horn Bolt - Replacement","slug":"ad-pa-23-23-rudder-tab-horn-bolt-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46206,"registerId":"commonwealth-F2006B05454-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/23 - Rudder Tab Horn Bolt - 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-23 (Apache and Aztec) Series Aeroplanes\n\n \n\nAD/PA-23/23  Rudder Tab Horn Bolt - Replacement 10/60 Applicability:              Model PA-23-250 with S/Nos. 27-7 to 27-317 with certain exceptions as in SB. Document:               Piper SB No. 196.\n\nCompliance: Within 25 hours time in service after 25 October 1960.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1254},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive maintains its original, narrow scope. It addresses a specific mechanical defect in a specific aircraft model range without expanding into broader operational or maintenance requirements."},"complexity_factors":["Single, unambiguous compliance action (bolt replacement)","Clear applicability criteria (specific model and serial number range)","Simple deadline structure (25 hours time in service after fixed date)","No nested exceptions or conditional logic","Short document with minimal cross-referencing (only to Piper Service Bulletin 196)"],"plain_english_summary":"**What this directive does:**\n\nThis is a mandatory safety order (called an Airworthiness Directive) that requires owners and operators of specific Piper Apache and Aztec aircraft to replace a bolt on the rudder tab horn.\n\n**Who it affects:**\n- Owners and operators of Piper PA-23-250 model aircraft with serial numbers between 27-7 and 27-317 (with some exceptions listed in Piper Service Bulletin No. 196)\n\n**What must be done:**\n- Replace the rudder tab horn bolt (a critical component that helps control the aircraft's rudder)\n- This must be done within 25 hours of flight time after 25 October 1960\n\n**Why it matters:**\nThe rudder tab horn bolt is essential for proper rudder control. If this bolt fails, the pilot could lose control of the aircraft's yaw (side-to-side movement), potentially leading to loss of control. This directive ensures a potentially faulty bolt is replaced before it can cause an accident."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-23-rudder-tab-horn-bolt-replacement","history":"/api/acts/ad-pa-23-23-rudder-tab-horn-bolt-replacement/history","analysis":"/api/acts/ad-pa-23-23-rudder-tab-horn-bolt-replacement/analysis","conflicts":"/api/acts/ad-pa-23-23-rudder-tab-horn-bolt-replacement/conflicts","importantCases":"/api/acts/ad-pa-23-23-rudder-tab-horn-bolt-replacement/important-cases","documents":"/api/acts/ad-pa-23-23-rudder-tab-horn-bolt-replacement/documents"}}