{"id":"F2006B09993","name":"AD/FU24/46 - Brake Torque Plates - Inspection and Modification","slug":"ad-fu24-46-brake-torque-plates-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55335,"registerId":"commonwealth-F2006B09993-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/FU24/46 - Brake Torque Plates - 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)  Airparts (NZ) Ltd. FU 24 Series Aeroplanes\n\n \n\nAD/FU24/46 Brake Torque Plates - Inspection and Modification\n\n\n5/73\n\n \n\nApplicability: All model FU24-950. Document: Air Parts SB No. AP.101.\n\nCompliance: Inspect at intervals not exceeding 100 hours time in service until modified. Modify within 300 hours time in service after 31 May 1973.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused on a specific mechanical component on a specific aircraft model. It has not expanded beyond its original purpose of addressing the brake torque plate safety issue identified in the referenced service bulletin."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 1 defined term implicitly referenced ('time in service' — standard aviation term meaning flight hours)","No cross-references to other legislation beyond the enabling regulation (Civil Aviation Regulations 1998, Part 39)","Simple conditional structure: inspect until modified, then stop inspecting","Single applicability criterion (model FU24-950)","References only one external technical document (Service Bulletin AP.101)"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of specific aircraft (Airkparts FU24-950 model aeroplanes) to:\n- **Inspect** the brake torque plates every 100 hours of flight time until a permanent fix is done\n- **Modify** the brake torque plates within 300 hours of flight time after 31 May 1973\n\n**Who it affects:** Anyone who owns, operates, or maintains FU24-950 model aircraft made by Airparts (NZ) Ltd.\n\n**Why it matters:** Brake torque plates are critical components that transfer braking force to the wheels. This AD was issued because of a safety concern identified in Air Parts Service Bulletin AP.101 — likely a defect that could cause brake failure if not addressed. Non-compliance is illegal and potentially dangerous.\n\n**Key dates to remember:**\n- The modification deadline is calculated from 31 May 1973\n- Inspections must happen every 100 hours until the modification is complete"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The document, as provided, applies explicitly to all Airparts FU24-950 aircraft and prescribes inspections and a modification by fixed time limits. Nothing in the supplied text indicates a change to that scope from the directive's own terms: applicability, the referenced service bulletin (Air Parts SB No. AP.101), and the compliance timings are stated directly. The AD does not expand or narrow the affected aircraft class beyond \"All model FU24-950.\" (Applicability; Document; Compliance.)"},"complexity_factors":["Narrow scope: applies to a single aircraft model (FU24-950) (Applicability).","Simple, fixed compliance mechanics: specific inspection interval and a clear modification deadline (Compliance).","Reference to a single service bulletin for technical details, creating a dependency on external document AP.101 for implementation (Document: Air Parts SB No. AP.101).","Vintage compliance dates (deadline referenced to 31 May 1973) may require historical record checks for contemporary compliance verification.","Potential supply or approval constraints for the referenced modification procedure or parts, not detailed in the AD (Document)."],"plain_english_summary":"Operators of Airparts FU24-950 aircraft must inspect brake torque plates every 100 hours until those plates are modified, and complete the mandated modification within 300 hours TIS after 31 May 1973 using Air Parts Service Bulletin No. AP.101.  \n\nThis affects FU24-950 owners/operators (inspection and modification costs, aircraft downtime, recordkeeping) and MROs (performing work); it trades increased safety compliance for recurring maintenance burden and potential supply/availability constraints."}},"importantCases":[],"_links":{"self":"/api/acts/ad-fu24-46-brake-torque-plates-inspection-and-modification","history":"/api/acts/ad-fu24-46-brake-torque-plates-inspection-and-modification/history","analysis":"/api/acts/ad-fu24-46-brake-torque-plates-inspection-and-modification/analysis","conflicts":"/api/acts/ad-fu24-46-brake-torque-plates-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-fu24-46-brake-torque-plates-inspection-and-modification/important-cases","documents":"/api/acts/ad-fu24-46-brake-torque-plates-inspection-and-modification/documents"}}