{"id":"F2006B05555","name":"AD/PA-25/18 - Jury Strut - Modification","slug":"ad-pa-25-18-jury-strut-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46523,"registerId":"commonwealth-F2006B05555-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-25/18 - Jury Strut - Modification","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-25 (Pawnee) Series Aeroplanes\n\n \n\nAD/PA-25/18 Jury Strut - Modification 5/64\n\nApplicability: Model PA-25 with S/Nos. 25-1 to 25-399. Document:  Piper SL No. 403.\n\nCompliance: Before 1 September 1971.\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\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2651},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains targeted at the specific airworthiness issue identified in early production Piper PA-25 series aircraft. It has not expanded beyond its original scope of requiring jury strut modifications for the specified serial numbers."},"complexity_factors":["Single incorporation by reference to external technical standard (Piper Service Letter No. 403)","Simple applicability criteria based only on aircraft serial number range","No exceptions, conditional clauses, or sub-delegations within the text","Single compliance deadline with no alternative methods of compliance stated"],"plain_english_summary":"This Airworthiness Directive (AD) requires owners and operators of specific **Piper PA-25 Pawnee** agricultural aircraft to modify a structural component called the **jury strut** (a support brace for the wing).\n\n**Who it affects:**\n- Owners of Piper PA-25 aircraft with serial numbers 25-1 through 25-399 (early production models)\n\n**What must be done:**\n- Carry out a modification to the jury strut exactly as specified in **Piper Service Letter No. 403**\n- The aircraft manufacturer provides the technical instructions; this directive legally mandates compliance with those instructions\n\n**When:**\n- Before 1 September 1971 (historical deadline)\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety orders issued by the Civil Aviation Safety Authority. This directive addresses a structural integrity issue with the wing support. Operating the aircraft without completing this modification would violate aviation law and compromise safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-25-18-jury-strut-modification","history":"/api/acts/ad-pa-25-18-jury-strut-modification/history","analysis":"/api/acts/ad-pa-25-18-jury-strut-modification/analysis","conflicts":"/api/acts/ad-pa-25-18-jury-strut-modification/conflicts","importantCases":"/api/acts/ad-pa-25-18-jury-strut-modification/important-cases","documents":"/api/acts/ad-pa-25-18-jury-strut-modification/documents"}}