{"id":"F2006B05535","name":"AD/PA-24/36 - Fin Forward Spar Attachment - Inspection","slug":"ad-pa-24-36-fin-forward-spar-attachment-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46442,"registerId":"commonwealth-F2006B05535-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-24/36 - Fin Forward Spar Attachment - 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-24 (Comanche) Series Aeroplanes\n\n \n\nAD/PA-24/36 Fin Forward Spar Attachment - Inspection 7/75\n\nApplicability: All models.\n\n \n\nRequirement: Visually inspect with the aid of a 5 power glass, the fin forward spar to fuselage attachment assembly where the channel P/N 20749-0 and the straps P/N 20749-5 and\n\n-6 are riveted together, for cracks in the area of the channel bend relief holes.\n\n \n\nNote: The part numbers quoted do not appear in the Parts Catalogue as they are components of the fin front spar which is listed as a complete assembly under a separate part number.\n\n \n\nCompliance: Within 25 hours time in service after 26 June 1975 and thereafter at intervals not exceeding 100 hours time in service.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2147},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive retains its original scope as a mandatory recurring inspection for specific aircraft structural components. It has not expanded beyond its initial safety purpose of preventing tail attachment failures."},"complexity_factors":["Single discrete maintenance task with no conditional branches or exceptions","Specific part numbers (P/N) provided for precise component identification","Simple compliance schedule with clear initial and recurring intervals","Limited applicability to specific aircraft model only","No cross-references to other legislative provisions"],"plain_english_summary":"This directive requires owners/operators of all Piper PA‑24 (Comanche) aircraft to perform recurring visual inspections of the fin forward spar attachment (channel and straps, parts 20749‑0/‑5/‑6) with a 5× magnifier to detect cracks at the bend relief holes. First inspection within 25 flight hours after 26 June 1975, then every 100 flight hours to prevent tail‑structure failure and potential loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-24-36-fin-forward-spar-attachment-inspection","history":"/api/acts/ad-pa-24-36-fin-forward-spar-attachment-inspection/history","analysis":"/api/acts/ad-pa-24-36-fin-forward-spar-attachment-inspection/analysis","conflicts":"/api/acts/ad-pa-24-36-fin-forward-spar-attachment-inspection/conflicts","importantCases":"/api/acts/ad-pa-24-36-fin-forward-spar-attachment-inspection/important-cases","documents":"/api/acts/ad-pa-24-36-fin-forward-spar-attachment-inspection/documents"}}