{"id":"F2006B11365","name":"AD/MU-2/35 - Horizontal Stabiliser Leading Edge Skin - Inspection and Modification","slug":"ad-mu-2-35-horizontal-stabiliser-leading-edge-skin-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57264,"registerId":"commonwealth-F2006B11365-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MU-2/35 - Horizontal Stabiliser Leading Edge Skin - Inspection and 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 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Mitsubishi MU-2 Series Aeroplanes\n\n \n\nAD/MU-2/35 Horizontal Stabiliser Leading Edge Skin - Inspection and Modification\n\n\n5/85\n\n \n\nApplicability: All models referenced in Mitsubishi Heavy Industries Service Recommendation No 062A.\n\n \n\nRequirement: Mitsubishi Heavy Industries Service Recommendation No. 062A.\n\n \n\nCompliance: Prior to issue of the next Maintenance Release after 31 May 1985 and thereafter at each issue of a new Maintenance Release until modified.\n\n \n\nBackground:  This Directive is issued to ensure cracked horizontal stabiliser leading edge skins are replaced and reinforced in accordance with the manufacturers repair scheme.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused specifically on horizontal stabiliser leading edge skin integrity. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 4 operative provisions: Applicability, Requirement, Compliance, and Background","No defined terms section - relies entirely on external reference (Mitsubishi Service Recommendation No. 062A)","Single cross-reference to external technical document","Simple temporal trigger (date-based) with straightforward recurring obligation","No nested conditions, exceptions, or conditional logic"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority for **Mitsubishi MU-2 series aeroplanes**.\n\n**What it does:**\n- Requires owners and operators to inspect the **horizontal stabiliser leading edge skin** (the front part of the small wing at the tail of the aircraft that keeps the plane stable)\n- If cracks are found, the skin must be **replaced and reinforced** following the manufacturer's specified repair scheme\n\n**Who it affects:**\n- All owners and operators of Mitsubishi MU-2 aircraft covered by **Mitsubishi Heavy Industries Service Recommendation No. 062A**\n\n**When it must be done:**\n- **Before** the next Maintenance Release (a certificate showing the aircraft is safe to fly) issued after **31 May 1985**\n- **Repeated at every Maintenance Release** until the modification is permanently completed\n\n**Why it matters:**\nCracks in this critical structural component could compromise the aircraft's stability and control, creating a serious flight safety risk. This directive ensures the problem is caught and fixed before the aircraft is cleared to fly."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive applies as originally framed to all MU-2 models referenced in Service Recommendation No. 062A and requires inspection and replacement/reinforcement of cracked leading edge skins per the manufacturer's repair scheme. The compliance timing remains tied to operators' Maintenance Releases until the modification is completed (Applicability; Requirement; Compliance; Background)."},"complexity_factors":["Narrow technical scope limited to horizontal stabiliser leading edge skin on specified MU-2 models (Applicability, Requirement)","Compliance timing tied to routine Maintenance Release schedule rather than an ad hoc deadline (Compliance)","Dependence on a separate technical document (Mitsubishi Heavy Industries Service Recommendation No. 062A) for procedural details (Requirement)","Ongoing administrative trigger (each Maintenance Release) until modification is complete (Compliance)","Implementation requires specialised maintenance work and parts, creating operational downtime and cost for operators (Requirement; Compliance)"],"plain_english_summary":"This AD requires owners/operators of specified Mitsubishi MU-2 aeroplanes to inspect the horizontal stabiliser leading edge skin and, where cracks are found, replace and reinforce it in accordance with Mitsubishi Heavy Industries Service Recommendation No. 062A.\n\nCompliance is mandatory by the next Maintenance Release after 31 May 1985 and at each subsequent Maintenance Release until modification is complete; owners/operators bear costs and CASA enforces the requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-mu-2-35-horizontal-stabiliser-leading-edge-skin-inspection-and-modification","history":"/api/acts/ad-mu-2-35-horizontal-stabiliser-leading-edge-skin-inspection-and-modification/history","analysis":"/api/acts/ad-mu-2-35-horizontal-stabiliser-leading-edge-skin-inspection-and-modification/analysis","conflicts":"/api/acts/ad-mu-2-35-horizontal-stabiliser-leading-edge-skin-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-mu-2-35-horizontal-stabiliser-leading-edge-skin-inspection-and-modification/important-cases","documents":"/api/acts/ad-mu-2-35-horizontal-stabiliser-leading-edge-skin-inspection-and-modification/documents"}}