{"id":"F2006B11315","name":"AD/MSR/17 - Central Front Horizontal Stabiliser Attachment Bracket - Inspection and Replacement","slug":"ad-msr-17-central-front-horizontal-stabiliser-attachment-bracket-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57169,"registerId":"commonwealth-F2006B11315-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MSR/17 - Central Front Horizontal Stabiliser Attachment Bracket - Inspection and Replacement","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)  Aerospatiale Rallye Series Aeroplanes\n\n \n\nAD/MSR/17 Central Front Horizontal Stabiliser Attachment\n\nBracket - Inspection and Replacement\n\n\n4/72\n\n \n\nApplicability: All models. Document: Rallye SB No. 40/1.\n\nCompliance: As detailed in the requirement document.\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":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Based on the provided text, the AD's scope is stated as applying to \"All models\" of the Aerospatiale Rallye series and requires actions set out in Rallye SB No. 40/1. The provided material contains no indication that the scope has changed from the instrument's stated applicability or original intent; therefore there is no evidence here of a scope change."},"complexity_factors":["AD text is short and defers all technical detail to an external requirement document (Rallye SB No. 40/1), requiring operators to obtain and interpret that document (Document / Compliance).","Technical nature: inspection and possible replacement of a structural attachment bracket requires qualified maintenance personnel and parts, adding operational and technical complexity (implicit in Compliance).","Applicability to all models expands the affected population and potentially increases logistical coordination across a fleet (Applicability: All models).","Lack of specific intervals, acceptance criteria, and cost estimates in the AD itself increases uncertainty for scheduling and budgeting (Compliance: As detailed in the requirement document).","Regulatory enforcement risk: operators must comply with the AD as issued by the civil aviation authority, creating legal compliance obligations tied to the external service bulletin (Civil Aviation Safety Authority / Compliance)."],"plain_english_summary":"This AD mandates inspection—and replacement if necessary—of the central front horizontal stabiliser attachment bracket on all Aerospatiale Rallye aircraft, with compliance per the procedures in Rallye Service Bulletin No. 40/1. It affects aircraft owners/operators and the maintenance organisations that must perform the work; the Civil Aviation Safety Authority enforces it. Costs for inspections, parts and labour fall to owners, and operators may face downtime and increased demand for Rallye maintenance services."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific known defect in a specific aircraft type. It has not expanded beyond its original purpose of ensuring airworthiness of the stabiliser attachment bracket."},"complexity_factors":["Extremely short document (approximately 150 words of substantive content)","No defined terms section — relies entirely on external referenced document (Rallye SB No. 40/1)","Simple applicability statement ('All models')","Single compliance requirement referencing external technical document","No conditional logic, exceptions, or nested provisions","Standardised AD format with minimal legislative drafting"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA). It applies to all models of **Aerospatiale Rallye series aeroplanes** (light aircraft).\n\n**What it does:**\n- Requires owners/operators to inspect and potentially replace the **central front horizontal stabiliser attachment bracket** — a critical structural component that connects the tail's horizontal stabiliser (the small wing at the back that keeps the plane level) to the aircraft fuselage.\n- The directive references **Rallye Service Bulletin No. 40/1** as the detailed instruction document for how to perform the inspection and replacement.\n\n**Who it affects:**\n- Owners and operators of Aerospatiale Rallye aircraft\n- Licensed aircraft maintenance engineers who work on these planes\n\n**Why it matters:**\n- This is a **mandatory safety requirement**. The attachment bracket is crucial for flight safety — if it fails, the pilot could lose control of the aircraft's pitch (nose-up/nose-down movement).\n- Compliance is legally required under the Civil Aviation Regulations. Non-compliance means the aircraft cannot legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-msr-17-central-front-horizontal-stabiliser-attachment-bracket-inspection-and-replacement","history":"/api/acts/ad-msr-17-central-front-horizontal-stabiliser-attachment-bracket-inspection-and-replacement/history","analysis":"/api/acts/ad-msr-17-central-front-horizontal-stabiliser-attachment-bracket-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-msr-17-central-front-horizontal-stabiliser-attachment-bracket-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-msr-17-central-front-horizontal-stabiliser-attachment-bracket-inspection-and-replacement/important-cases","documents":"/api/acts/ad-msr-17-central-front-horizontal-stabiliser-attachment-bracket-inspection-and-replacement/documents"}}