{"id":"F2006B09974","name":"AD/FU24/10 - Fuel Sump Corrosion - Inspection","slug":"ad-fu24-10-fuel-sump-corrosion-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55261,"registerId":"commonwealth-F2006B09974-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/FU24/10 - Fuel Sump Corrosion - 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)  Airparts (NZ) Ltd. FU 24 Series Aeroplanes\n\n \n\nAD/FU24/10 Fuel Sump Corrosion - Inspection 6/68\n\nApplicability: All models fitted with fuel tank sump P/N 244810.\n\n \n\nRequirement: Remove the fuel sump, P/N 244810 from the aircraft and thoroughly inspect the interior and exterior for corrosion.\n\n \n\nCompliance: At intervals not exceeding 12 months.\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","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument itself specifies its scope: it applies to all models fitted with fuel sump P/N 244810 and mandates removal and inspection at intervals not exceeding 12 months (Applicability; Requirement; Compliance). The text contains no indication that the scope has been altered from some earlier or different intent."},"complexity_factors":["Narrow applicability: applies only to aircraft fitted with fuel sump P/N 244810 (Applicability).","Single, specific required action: remove the sump and inspect interior and exterior for corrosion (Requirement).","Fixed compliance interval reduces discretionary scheduling: every 12 months (Compliance).","Technical execution required: removal and 'thorough' inspection implies need for qualified maintenance and potential follow‑up repairs, adding operational downtime (Requirement).","Lack of procedural detail in the text (inspection methods, personnel qualifications, recordkeeping) leaves implementation steps to operators or other regulations, which can create variation in practice (Requirement)."],"plain_english_summary":"This AD mandates that any aeroplane fitted with fuel sump P/N 244810 must have that sump removed and thoroughly inspected for corrosion at intervals not exceeding 12 months. Operators/owners bear the cost, scheduling and recordkeeping burden; compliance increases recurring maintenance, potential repair or replacement costs and aircraft downtime, and non‑compliance constitutes an airworthiness breach."},"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused specifically on fuel sump corrosion in one aircraft series. It has not expanded beyond its original narrow technical purpose."},"complexity_factors":["Extremely short document (under 150 words)","No defined terms section","No cross-references to other legislation","Simple, unconditional directive with clear applicability criteria","Single compliance requirement with straightforward 12-month interval","No exceptions, exemptions, or conditional logic"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA).\n\n**What it does:**\nIt requires owners and operators of certain Airparts (NZ) Ltd. FU 24 series aeroplanes to **inspect a specific fuel tank component** (the fuel sump, part number 244810) for corrosion.\n\n**Who it affects:**\nAnyone who owns or operates an FU 24 series aircraft that has this particular fuel sump installed.\n\n**What must be done:**\n- **Remove** the fuel sump from the aircraft\n- **Thoroughly inspect** both the inside and outside for corrosion (rust or deterioration)\n- **Repeat this inspection** at least once every 12 months\n\n**Why it matters:**\nFuel sump corrosion can lead to fuel leaks, fuel contamination, or structural failure — any of which could cause engine failure or fire. This AD exists to catch problems before they become catastrophic."}},"importantCases":[],"_links":{"self":"/api/acts/ad-fu24-10-fuel-sump-corrosion-inspection","history":"/api/acts/ad-fu24-10-fuel-sump-corrosion-inspection/history","analysis":"/api/acts/ad-fu24-10-fuel-sump-corrosion-inspection/analysis","conflicts":"/api/acts/ad-fu24-10-fuel-sump-corrosion-inspection/conflicts","importantCases":"/api/acts/ad-fu24-10-fuel-sump-corrosion-inspection/important-cases","documents":"/api/acts/ad-fu24-10-fuel-sump-corrosion-inspection/documents"}}