{"id":"F2006B05961","name":"AD/PA-38/22 - Aft Vertical Fin Spar - Inspection","slug":"ad-pa-38-22-aft-vertical-fin-spar-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136130,"registerId":"commonwealth-F2006B05961-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-38/22 - Aft Vertical Fin Spar - 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-38 (Tomahawk) Series Aeroplanes\n\n \n\nAD/PA-38/22 Aft Vertical Fin Spar - Inspection 3/83\n\nApplicability: All model PA-38-112 with S/Nos. 38-78A0001 to 38-80A0198. Document:  Piper Service Bulletin No. 745 Part IV.\n\nCompliance: Within 100 hours time in service after 31 March 1983 for aircraft which have achieved 2500 hours time in service and thereafter at intervals not exceeding 200 hours time in service.\n\n \n\nBackground:  Manufacturers testing has revealed that cracks may develop in the aft vertical fin spar and bulkhead.\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":1439},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: mandating specific structural inspections for a defined subset of Piper PA-38 aircraft based on manufacturer safety findings. No expansion of scope beyond the original safety-critical inspection requirement is evident."},"complexity_factors":["Single, clearly defined applicability (specific serial number range)","Straightforward compliance timeline based on accumulated flight hours (Time In Service)","No nested exceptions or conditional logic beyond the initial 2,500-hour threshold","References external technical document for actual inspection procedures"],"plain_english_summary":"This mandatory Airworthiness Directive requires owners/operators of Piper PA-38-112 Tomahawk aeroplanes (S/N 38-78A0001 through 38-80A0198) to inspect the aft vertical fin spar and bulkhead for cracks per Piper Service Bulletin No. 745 Part IV.\n\nInitial inspection is required within 100 flight hours after 31 March 1983 for aircraft with ≥2,500 hours, with repeat inspections every 200 flight hours thereafter to prevent potential tail structural failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-38-22-aft-vertical-fin-spar-inspection","history":"/api/acts/ad-pa-38-22-aft-vertical-fin-spar-inspection/history","analysis":"/api/acts/ad-pa-38-22-aft-vertical-fin-spar-inspection/analysis","conflicts":"/api/acts/ad-pa-38-22-aft-vertical-fin-spar-inspection/conflicts","importantCases":"/api/acts/ad-pa-38-22-aft-vertical-fin-spar-inspection/important-cases","documents":"/api/acts/ad-pa-38-22-aft-vertical-fin-spar-inspection/documents"}}