{"id":"F2006B07076","name":"AD/SM-260/17 - Aileron Balance Weight Security","slug":"ad-sm-260-17-aileron-balance-weight-security","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48836,"registerId":"commonwealth-F2006B07076-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SM-260/17 - Aileron Balance Weight Security","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-260/17 Aileron Balance Weight Security 12/87 DM\n\nApplicability: All models F260, F260B, F260C, and F260D up to S/No 749 Requirement:  Action in accordance with SIAI Marchetti SB 260-B52.\n\nCompliance: Within 10 hours time in service after 23 September 1987 and thereafter every 50 hours time in service.\n\n \n\nBackground:  There has been a case of lost and loose screws that secure the aileron balance weight. Loss of the balance weight will affect the flutter characteristics of the aileron control system.\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":2250},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains focused on its original purpose of securing aileron balance weights on the specified aircraft. No scope expansion has occurred."},"complexity_factors":["Very short single-issue directive with no defined terms section","External technical reference to manufacturer Service Bulletin 260-B52","Specific applicability limited to named aircraft models and serial number range"],"plain_english_summary":"This AD requires owners/operators of SIAI Marchetti F260/F260B/F260C/F260D aircraft (serial numbers up to 749) to inspect and secure the aileron balance-weight screws per Service Bulletin 260‑B52.  \n\nInitial inspection is within 10 flight hours after 23 Sept 1987 and repeat inspections every 50 flight hours to prevent detached weights, which can cause severe aileron flutter and possible loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sm-260-17-aileron-balance-weight-security","history":"/api/acts/ad-sm-260-17-aileron-balance-weight-security/history","analysis":"/api/acts/ad-sm-260-17-aileron-balance-weight-security/analysis","conflicts":"/api/acts/ad-sm-260-17-aileron-balance-weight-security/conflicts","importantCases":"/api/acts/ad-sm-260-17-aileron-balance-weight-security/important-cases","documents":"/api/acts/ad-sm-260-17-aileron-balance-weight-security/documents"}}