{"id":"F2006B06488","name":"AD/RAD/26 Amdt 1 - Leigh Emergency Locator Transmitter Systems - Modification","slug":"ad-rad-26-amdt-1-leigh-emergency-locator-transmitter-systems-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48022,"registerId":"commonwealth-F2006B06488-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/RAD/26 Amdt 1 - Leigh Emergency Locator Transmitter Systems - 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 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Radio Communication and Navigation Equipment\n\n \n\nAD/RAD/26\n\nAmdt 1\n\n\nLeigh Emergency Locator Transmitter Systems - Modification\n\nSuperseded by AD/RAD/35A.\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\n \n\n \n\n\n7/78\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"rejected","complexity_score":2,"rejection_reason":"The content provided is a fragment/stub only — it contains only the directive identifier, title, supersession notice, and metadata. No actual legislative text (modification requirements, applicability, compliance methods, or technical standards) is present. This appears to be a navigation page or index entry from a larger document rather than the substantive Airworthiness Directive itself.","scope_assessment":{"changed":false,"description":"The document provided is only a header/stub indicating the directive exists and has been superseded. No substantive content is included to assess scope changes. Airworthiness Directives are inherently narrow, technical instruments addressing specific equipment safety issues, so significant scope creep would be unusual."},"complexity_factors":["Extremely short document — essentially a title page with metadata only","No substantive operational text provided (no modification instructions, compliance times, or technical specifications included)","Single cross-reference to superseding directive (AD/RAD/35A)","No defined terms, conditional logic, or exceptions visible in the extracted content","Document appears to be a header/navigation stub rather than full legislative instrument"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) that requires aircraft owners or operators to take specific action to fix a safety problem.\n\n**What it does:**\nThis directive (AD/RAD/26, Amendment 1) required modifications to **Leigh Emergency Locator Transmitter (ELT) Systems** — emergency beacons that automatically alert rescue services if an aircraft crashes.\n\n**Who it affects:**\nOwners and operators of aircraft fitted with Leigh brand ELT systems.\n\n**Why it matters:**\nEmergency locator transmitters are critical safety equipment. If they malfunction or fail to activate, search and rescue teams may not be alerted to aircraft accidents, potentially costing lives. This directive ensured these specific ELT models were modified to meet safety standards.\n\n**Current status:**\nThis directive has been **superseded** (replaced) by AD/RAD/35A, meaning the requirements in this document no longer apply — aircraft operators must now follow the newer directive instead."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The instrument shown is Amendment 1 to AD/RAD/26, indicating that it modified the original AD. The supplied entry also states it was later superseded by AD/RAD/35A, indicating the original scope was subsequently replaced. The excerpt does not include the text of the amendment itself, so the precise nature of the change to the original AD (what was added, removed, or altered) cannot be determined from this material."},"complexity_factors":["The supplied text is an index/schedule entry rather than the full AD—operative details (technical instructions, compliance times, affected serials/models) are absent.","Regulatory placement under Civil Aviation Regulations 1998 Part 39 implies linkage to a broader legal and administrative regime (tracking ADs, compliance enforcement, record-keeping).","Amendment and supersession history (Amdt 1; later superseded by AD/RAD/35A) require historical tracking to determine the currently operative requirement.","Potential operational complexity (need for maintenance, parts, approved procedures) is not specified, leaving practical burden indeterminate from the excerpt.","Stakeholder identification is incomplete in the excerpt (no explicit list of affected aircraft, owners, or operators)."],"plain_english_summary":"This is a CASA airworthiness directive (AD/RAD/26 Amendment 1) that mandates a modification to specified Leigh emergency locator transmitter (ELT) systems, affecting owners, operators and maintainers of aircraft fitted with those units. The supplied entry is a schedule notice only—it identifies the requirement but omits technical instructions, compliance dates, costs and enforcement details; the AD was later superseded by AD/RAD/35A."}},"importantCases":[],"_links":{"self":"/api/acts/ad-rad-26-amdt-1-leigh-emergency-locator-transmitter-systems-modification","history":"/api/acts/ad-rad-26-amdt-1-leigh-emergency-locator-transmitter-systems-modification/history","analysis":"/api/acts/ad-rad-26-amdt-1-leigh-emergency-locator-transmitter-systems-modification/analysis","conflicts":"/api/acts/ad-rad-26-amdt-1-leigh-emergency-locator-transmitter-systems-modification/conflicts","importantCases":"/api/acts/ad-rad-26-amdt-1-leigh-emergency-locator-transmitter-systems-modification/important-cases","documents":"/api/acts/ad-rad-26-amdt-1-leigh-emergency-locator-transmitter-systems-modification/documents"}}