{"id":"F2006B05466","name":"AD/PA-23/40 Amdt 1 - Front Spar - Inspection","slug":"ad-pa-23-40-amdt-1-front-spar-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46243,"registerId":"commonwealth-F2006B05466-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/40 Amdt 1 - Front Spar -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-23 (Apache and Aztec) Series Aeroplanes\n\n \n\n# AD/PA-23/40\n\nAmdt 1\n\nApplicability: Model PA-23-250.\n\n# Front Spar - Inspection 11/70\n\n \n\nRequirement: Inspect the inboard end of the lower flange of the front spar, P/N 16010, for cracking.\n\n \n\nCompliance: At intervals not exceeding 100 hours time in service after 9 December 1970.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1632},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This amendment maintains the original narrow scope focused solely on front spar inspections for the PA-23-250 model. As Amendment 1, it likely clarifies or updates the original AD/PA-23/40 without expanding beyond the specific airworthiness issue addressed."},"complexity_factors":["Single, specific mechanical component identified by exact part number","One straightforward inspection requirement with no exceptions or conditional logic","Simple recurring compliance schedule (every 100 hours)","Limited applicability to only one aircraft model (PA-23-250)","No defined terms, cross-references, or nested provisions"],"plain_english_summary":"**What this is:** An air safety directive for owners and operators of Piper PA-23-250 aircraft (part of the Apache and Aztec series).\n\n**What it requires:** You must inspect a specific structural component — the inboard end of the lower flange of the front spar (part number 16010) — for cracks.\n\n**Why it matters:** Cracks in the spar (the main structural beam that supports the wing) could lead to wing failure and catastrophic accidents. This rule prevents that by catching damage early before it causes structural failure.\n\n**When to do it:** Every 100 hours of flight time (called \"time in service\") starting from 9 December 1970.\n\n**Who it affects:** Anyone operating the PA-23-250 model aircraft — typically private owners, flying schools, and charter operators using these twin-engine planes."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-40-amdt-1-front-spar-inspection","history":"/api/acts/ad-pa-23-40-amdt-1-front-spar-inspection/history","analysis":"/api/acts/ad-pa-23-40-amdt-1-front-spar-inspection/analysis","conflicts":"/api/acts/ad-pa-23-40-amdt-1-front-spar-inspection/conflicts","importantCases":"/api/acts/ad-pa-23-40-amdt-1-front-spar-inspection/important-cases","documents":"/api/acts/ad-pa-23-40-amdt-1-front-spar-inspection/documents"}}