{"id":"F2006B07079","name":"AD/SM-260/2 - Stabiliser Front Spar - Modification","slug":"ad-sm-260-2-stabiliser-front-spar-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48841,"registerId":"commonwealth-F2006B07079-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SM-260/2 - Stabiliser Front Spar - 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)  SIAI Marchetti 260 Series Aeroplanes\n\n \n\nAD/SM-260/2 Stabiliser Front Spar - Modification 5/70\n\nApplicability: All F260 series with S/Nos. 101 to 107, 109 to 111, 113 and 114. Document:  SIAI Marchetti SB No. 260B1.\n\nCompliance: Forthwith.\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":1148},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive remains tightly focused on the specific stabiliser front spar modification for the identified aircraft serial numbers, with no expansion beyond the original technical safety purpose."},"complexity_factors":["Single operative requirement spanning four lines","No interpretation section or defined terms","Only one external reference (manufacturer Service Bulletin 260B1)","Binary applicability test based solely on aircraft serial number"],"plain_english_summary":"**What this does:** This is a mandatory aviation safety order (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority (CASA). It requires owners and operators of specific SIAI Marchetti F260 series aircraft to immediately carry out a structural modification to the front spar of the stabiliser (the horizontal tail section).\n\n**Who it affects:** Only owners/operators of SIAI Marchetti F260 aircraft with serial numbers 101–107, 109–111, 113, and 114.\n\n**What you must do:** You must immediately comply with the modification instructions contained in the manufacturer's Service Bulletin No. 260B1. The directive uses the term \"forthwith,\" which means immediately—there is no grace period.\n\n**Why it matters:** This directive addresses a specific airworthiness issue with the stabiliser front spar on these particular vintage aircraft. Operating an aircraft without completing this modification violates civil aviation safety regulations, and the aircraft is not legally airworthy until the work is done."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sm-260-2-stabiliser-front-spar-modification","history":"/api/acts/ad-sm-260-2-stabiliser-front-spar-modification/history","analysis":"/api/acts/ad-sm-260-2-stabiliser-front-spar-modification/analysis","conflicts":"/api/acts/ad-sm-260-2-stabiliser-front-spar-modification/conflicts","importantCases":"/api/acts/ad-sm-260-2-stabiliser-front-spar-modification/important-cases","documents":"/api/acts/ad-sm-260-2-stabiliser-front-spar-modification/documents"}}