{"id":"F2006B11121","name":"AD/LEARJET 35/6 - Wing to Fuselage Attachment - Modification","slug":"ad-learjet-35-6-wing-to-fuselage-attachment-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56792,"registerId":"commonwealth-F2006B11121-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/LEARJET 35/6 - Wing to Fuselage Attachment - 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)  Gates Learjet 35 and 36 Series Aeroplanes\n\n \n\nAD/LEARJET 35/6 Wing to Fuselage Attachment - Modification 9/77\n\nApplicability: All models 35 with S/Nos. 35-001 to 35-110 except 35-107;\n\n \n\nAll models 36 with S/Nos. 36-001 to 36-031.\n\n \n\nRequirement: Modify the wing to fuselage attachment to accordance with Gates Learjet Kit No.\n\nAMK 77-6.\n\n \n\nCompliance: Within 300 hours time in service after 30 September 1977.\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":{"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 in specific aircraft. It has not expanded beyond its original purpose of mandating a structural modification for safety reasons."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 4 defined elements: specific aircraft models, serial number ranges, one exemption (S/N 35-107), and one kit reference","Single unconditional requirement with clear compliance deadline","No cross-references to other legislation or regulations beyond the enabling authority (Civil Aviation Regulations 1988, Part 39)","No nested conditions, exceptions, or discretionary provisions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1988.\n\n**What it does:**\nIt requires owners and operators of specific Gates Learjet 35 and 36 series aircraft to modify how the wings attach to the fuselage (the main body of the plane). The modification must be done using a specific kit (Gates Learjet Kit No. AMK 77-6).\n\n**Who it affects:**\n- **Learjet Model 35 aircraft** with serial numbers 35-001 through 35-110, **except** serial number 35-107\n- **Learjet Model 36 aircraft** with serial numbers 36-001 through 36-031\n\n**Why it matters:**\nWing-to-fuselage attachment points are critical structural components. If they fail, the wing could separate from the aircraft with catastrophic results. This AD addresses a known safety defect or design weakness in these specific aircraft. The compliance deadline (within 300 hours of flying time after 30 September 1977) ensures the fix happens relatively quickly but allows operators some scheduling flexibility.\n\n**Key takeaway:** If you own or operate one of these specific Learjets, you **must** get this modification done within the specified timeframe or the aircraft cannot legally fly."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive requires a specified modification for identified serial-number ranges within a stated compliance period. Nothing in the text indicates the scope has been broadened or narrowed from the instrument's stated action: it remains a mandatory modification for the listed Learjet 35 and 36 aircraft using Kit No. AMK 77-6, to be completed within 300 hours time in service after 30 September 1977 (Applicability, Requirement, Compliance)."},"complexity_factors":["Narrow applicability: specific aircraft models and serial-number ranges (Applicability).","Single discrete technical requirement: install a named kit (Requirement).","Clear, short compliance window expressed in flight hours and a calendar anchor (300 hours after 30 September 1977) (Compliance).","No procedural detail included for the kit installation in the text; implementers must obtain kit documentation separately, creating practical implementation steps outside the directive (Requirement).","No alternative compliance methods or exemptions stated, reducing procedural complexity but increasing binary compliance pressure (Requirement/Compliance)."],"plain_english_summary":"This airworthiness directive mandates a physical modification to the wing-to-fuselage attachment on specified Gates Learjet 35 and 36 serial numbers using Kit No. AMK 77-6, to be completed within 300 flight hours after 30 September 1977. Owners/operators of the listed aircraft must arrange and pay for the work and record compliance; the requirement is compulsory under the Commonwealth airworthiness directive framework."}},"importantCases":[],"_links":{"self":"/api/acts/ad-learjet-35-6-wing-to-fuselage-attachment-modification","history":"/api/acts/ad-learjet-35-6-wing-to-fuselage-attachment-modification/history","analysis":"/api/acts/ad-learjet-35-6-wing-to-fuselage-attachment-modification/analysis","conflicts":"/api/acts/ad-learjet-35-6-wing-to-fuselage-attachment-modification/conflicts","importantCases":"/api/acts/ad-learjet-35-6-wing-to-fuselage-attachment-modification/important-cases","documents":"/api/acts/ad-learjet-35-6-wing-to-fuselage-attachment-modification/documents"}}