{"id":"F2006B11329","name":"AD/MSR/3 - Spot Welding of Skin to Rear Fuselage Frame - Inspection","slug":"ad-msr-3-spot-welding-of-skin-to-rear-fuselage-frame-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57197,"registerId":"commonwealth-F2006B11329-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MSR/3 - Spot Welding of Skin to Rear Fuselage Frame - Inspection","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/3 Spot Welding of Skin to Rear Fuselage Frame - Inspection\n\nApplicability: All models with S/Nos. 1 to 80. Document:  1. Rallye SB No. 6; or\n\n2. MS Mod. No. 17.\n\n \n\nCompliance: At intervals not exceeding 100 hours time in service.\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\n8/62\n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The provided text sets a clear and limited scope: inspections apply to Aerospatiale Rallye series aeroplanes with serial numbers 1–80 and must occur at intervals not exceeding 100 hours TIS, with procedures in Rallye SB No.6 or MS Mod. No.17. The extract contains no indication that the scope has been altered from an earlier or original intent."},"complexity_factors":["Narrow, well-defined applicability (\"All models with S/Nos. 1 to 80\") reduces scope uncertainty.","Single, simple compliance requirement (inspection at intervals not exceeding 100 hours TIS) lowers procedural complexity.","Dependence on external technical documents (Rallye SB No.6 or MS Mod. No.17) increases practical complexity because operators must obtain and apply those documents.","Absence of repair/acceptance criteria within the AD text itself shifts substantive technical discretion to the referenced documents or maintenance authorities.","Record-keeping, scheduling and potential follow-on repairs create operational and cost complexity for operators despite the AD’s textual simplicity."],"plain_english_summary":"This directive requires owners/operators of Aerospatiale Rallye aeroplanes S/Ns 1–80 to carry out recurring inspections (≤100 hours TIS) of the spot-welded joint between skin and rear fuselage frame, using the procedures in Rallye Service Bulletin No. 6 or MS Modification No. 17.\n\nIt creates a standing maintenance obligation that reduces aircraft availability and imposes inspection and repair costs on operators."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused specifically on spot weld inspection for a limited production run of aircraft (serial numbers 1-80). It has not expanded beyond its original purpose of addressing a known structural concern in early-model Rallye aircraft."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 3 operative requirements: applicability, document reference, and compliance interval","No defined terms section","No cross-references to other legislation","No conditional logic or exceptions","Single compliance trigger (100 hours time in service)","Standard aviation regulatory format following established AD template"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) that applies to specific Aerospatiale Rallye series aeroplanes.\n\n**What it does:**\n- Requires regular **inspections of spot welds** where the aircraft's skin (outer metal covering) attaches to the rear fuselage frame (the back section of the plane's body structure).\n\n**Who it affects:**\n- Owners and operators of Aerospatiale Rallye aircraft with **serial numbers 1 to 80**.\n\n**What must be done:**\n- Inspections must be carried out **every 100 hours of flight time** (\"time in service\" means actual flying hours, not just calendar time).\n\n**Why it matters:**\n- Spot welds in this area can fail due to stress and vibration during flight. If these welds crack or break, it could compromise the structural integrity of the aircraft's rear fuselage, potentially leading to serious safety issues. This directive ensures potential problems are caught early before they become dangerous.\n\n**Technical references:**\n- The inspections must follow procedures set out in either **Rallye Service Bulletin No. 6** or **MS Modification No. 17** (these are manufacturer documents that detail exactly how to inspect and fix the welds)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-msr-3-spot-welding-of-skin-to-rear-fuselage-frame-inspection","history":"/api/acts/ad-msr-3-spot-welding-of-skin-to-rear-fuselage-frame-inspection/history","analysis":"/api/acts/ad-msr-3-spot-welding-of-skin-to-rear-fuselage-frame-inspection/analysis","conflicts":"/api/acts/ad-msr-3-spot-welding-of-skin-to-rear-fuselage-frame-inspection/conflicts","importantCases":"/api/acts/ad-msr-3-spot-welding-of-skin-to-rear-fuselage-frame-inspection/important-cases","documents":"/api/acts/ad-msr-3-spot-welding-of-skin-to-rear-fuselage-frame-inspection/documents"}}