{"id":"F2006B09985","name":"AD/FU24/38 - Main Landing Gear Lower Torque Link - Modification","slug":"ad-fu24-38-main-landing-gear-lower-torque-link-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55302,"registerId":"commonwealth-F2006B09985-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/FU24/38 - Main Landing Gear Lower Torque Link - 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)  Airparts (NZ) Ltd. FU 24 Series Aeroplanes\n\n \n\nAD/FU24/38  Main Landing Gear Lower Torque Link - Modification\n\nApplicability: All models with S/Nos. 139 to 155. Document:  Air Parts SB No. AP61.\n\nCompliance: Before 30 July 1971.\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\n1/71\n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive as presented sets a single, targeted requirement: modify the main landing gear lower torque link on FU 24 aeroplanes with serial numbers 139–155 using Air Parts SB No. AP61, by the stated deadline. The text provides no indication that the scope was altered from any earlier version; it is narrowly focused and prescriptive as written (Applicability, Document, Compliance)."},"complexity_factors":["Narrow, specific applicability (only FU 24 series aircraft with S/Ns 139–155). (Applicability)","Single, fixed compliance action referenced to a single service bulletin (Air Parts SB No. AP61). (Document)","Clear, single deadline (before 30 July 1971) leaving no alternative compliance path in the text. (Compliance)","Technical work required (landing gear modification) that may require specialised maintenance resources and parts, creating operational and logistical complexity for implementers despite legal simplicity. (Document, Compliance)","Limited textual detail in the instrument about rationale, alternatives, or enforcement mechanisms—implementation depends on external technical guidance in the referenced service bulletin. (Document)"],"plain_english_summary":"This directive mandates a specific modification to the main landing gear lower torque link on Airparts (NZ) FU‑24 aeroplanes with serial numbers 139–155, to be done in accordance with Air Parts Service Bulletin No. AP61 and completed before 30 July 1971. Owners/operators bear the cost and must schedule certified maintenance to meet the fixed deadline; the Civil Aviation Safety Authority enforces compliance."},"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1971 addressing a specific mechanical modification. It has not expanded beyond its original purpose of mandating a landing gear modification for a limited aircraft population."},"complexity_factors":["Extremely short document — only 4 substantive lines","No defined terms section","No cross-references to other legislation beyond the enabling regulation (Civil Aviation Regulations 1998, Part 39)","Single, unambiguous compliance requirement with clear deadline","No conditional logic, exceptions, or nested provisions","Simple applicability criteria (serial number range)"],"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.\n\n**What it does:**\nIt requires owners and operators of specific Airparts (NZ) Ltd. FU 24 series aeroplanes to modify the **main landing gear lower torque link** (a component that helps the landing gear function properly during takeoff and landing).\n\n**Who it affects:**\n- Owners and operators of Airparts FU 24 series aircraft\n- Specifically those with **serial numbers 139 to 155**\n\n**What must be done:**\n- Follow the instructions in **Air Parts Service Bulletin No. AP61** (the manufacturer's official technical notice)\n- Complete the modification **before 30 July 1971**\n\n**Why it matters:**\nAirworthiness Directives are legally enforceable safety requirements. If you don't comply, you cannot legally fly the aircraft. This particular AD addresses a potential safety defect in the landing gear — a critical system for safe landings. The modification prevents possible landing gear failure that could lead to accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-fu24-38-main-landing-gear-lower-torque-link-modification","history":"/api/acts/ad-fu24-38-main-landing-gear-lower-torque-link-modification/history","analysis":"/api/acts/ad-fu24-38-main-landing-gear-lower-torque-link-modification/analysis","conflicts":"/api/acts/ad-fu24-38-main-landing-gear-lower-torque-link-modification/conflicts","importantCases":"/api/acts/ad-fu24-38-main-landing-gear-lower-torque-link-modification/important-cases","documents":"/api/acts/ad-fu24-38-main-landing-gear-lower-torque-link-modification/documents"}}