{"id":"F2006B07078","name":"AD/SM-260/19 - Airspeed Indicator Markings","slug":"ad-sm-260-19-airspeed-indicator-markings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48840,"registerId":"commonwealth-F2006B07078-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SM-260/19 - Airspeed Indicator Markings","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-260/19 Airspeed Indicator Markings 12/95\n\nApplicability: This Directive is applicable to all F260, F260B, F260C and F260D aircraft, up to and including serial number 848.\n\nNote: SIAI Marchetti advise that the Model F260 series may also be known or referred to as the Model SF260 series.\n\nRequirement: Apply a black arc to the airspeed indicator (ASI) in accordance with SIAI Marchetti Service Bulletin 260B54.\n\nNote: RAI AD 93-220 refers.\n\nCompliance: Within 50 hours time in service from 9 November 1995.\n\n \n\nBackground: SIAI Marchetti have conducted a review of the aircraft operating speed ranges which lead to a reduction in the normal operating speed range, necessitating remarking of the ASI.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific airworthiness issue (incorrect airspeed markings) for a narrow class of aircraft. It has not expanded beyond its original purpose."},"complexity_factors":["Single, unambiguous requirement (apply a marking)","Only 4 aircraft models and 1 serial number range specified","No defined terms section","No cross-references to other legislation (only references a manufacturer service bulletin and a related Italian aviation directive)","Single compliance deadline with straightforward calculation (50 hours time in service from fixed date)","No exceptions, exemptions, or conditional logic"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires specific maintenance action on certain aircraft.\n\n**What it does:**\n- Requires owners/operators of specific SIAI Marchetti 260 series aeroplanes (models F260, F260B, F260C, and F260D with serial numbers up to 848) to **add a black arc marking to their airspeed indicator** (the cockpit gauge showing how fast the plane is flying).\n\n**Why it matters:**\n- The aircraft manufacturer reviewed the plane's safe operating speeds and discovered the normal flying speed range needed to be **narrowed** (made smaller/slower). \n- The black arc on the airspeed indicator marks this new, reduced safe speed range so pilots don't accidentally fly too fast in normal conditions.\n\n**Who must comply:**\n- Anyone operating these specific Italian-made military trainer/light attack aircraft in Australia.\n\n**When:**\n- Within 50 hours of flying time after 9 November 1995.\n\n**How:**\n- Follow the manufacturer's Service Bulletin 260B54 for exact instructions on applying the marking."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The directive implements a change resulting from a reduction in the normal operating speed range (Background) by requiring ASI remarking; scope is limited to ASI markings and the listed F260-series aircraft up to serial 848 (Applicability), so it narrows the aircraft’s documented operating-speed envelope rather than imposing broader equipment or flight limitations."},"complexity_factors":["Narrow, clearly defined applicability (specific models F260/F260B/F260C/F260D up to serial 848) — 'Applicability'.","Single, discrete technical action required (apply a black arc to the ASI) — 'Requirement'.","Procedure delegated to an external document (SIAI Marchetti Service Bulletin 260B54) — dependency on manufacturer's SB for execution details.","Short compliance window (50 hours time in service from 9 November 1995) creating scheduling/administrative burden — 'Compliance'.","Reference to prior AD (RAI AD 93-220) that may require cross-checking historical directives — 'Requirement' note.","Technical rationale tied to revised operating-speed limits (reduced normal operating speed range) but no additional operational restrictions set out in this text — 'Background'."],"plain_english_summary":"Requires owners/operators of SIAI Marchetti Model F260/F260B/F260C/F260D aeroplanes (serials up to 848) to apply a black arc to the airspeed indicator according to SIAI Marchetti Service Bulletin 260B54, within 50 flight hours of 9 November 1995. The Civil Aviation Safety Authority issues the directive; operators pay for and arrange the marking and any maintenance. SIAI Marchetti’s review says the normal operating speed range has been reduced, so pilots must rely on the revised ASI marking when operating the aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sm-260-19-airspeed-indicator-markings","history":"/api/acts/ad-sm-260-19-airspeed-indicator-markings/history","analysis":"/api/acts/ad-sm-260-19-airspeed-indicator-markings/analysis","conflicts":"/api/acts/ad-sm-260-19-airspeed-indicator-markings/conflicts","importantCases":"/api/acts/ad-sm-260-19-airspeed-indicator-markings/important-cases","documents":"/api/acts/ad-sm-260-19-airspeed-indicator-markings/documents"}}