{"id":"F2006B11041","name":"AD/KITFOX/3 - Aluminium Fuel Tanks","slug":"ad-kitfox-3-aluminium-fuel-tanks","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56657,"registerId":"commonwealth-F2006B11041-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/KITFOX/3 - Aluminium Fuel Tanks","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nKitfox Series Aeroplanes\n\nAD/KITFOX/3 Aluminium Fuel Tanks 4/92\n\nApplicability: Models equipped with aluminium fuel tanks.\n\nRequirement: Visually inspect the aluminium fuel tanks for evidence of leakage.\n\nNote: Denney Aircraft Company SB 10 refers.\n\nCompliance: Before and after each flight; until replaced with fibreglass tanks.\n\nNote: This Directive shall be entered on the Maintenance Release as maintenance required. The visual inspection required may be performed by the pilot in command in which case certification is to be made by entering AD/KITFOX/3 against daily inspection certification of the Maintenance Release. A copy of this Airworthiness Directive is to be carried in the aircraft.\n\nBackground: Reports have been received of fuel leakage from the leading edge area of in-service six gallon aluminium wing tanks. The manufacturer has instigated a tank conversion program at minimal cost to the operator.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's scope is confined to Kitfox series aeroplanes fitted with aluminium fuel tanks and requires visual pre- and post-flight inspections until tanks are replaced with fibreglass (Applicability; Requirement; Compliance). The instrument does not expand to other models, other tank materials, or other inspection methods in the text provided."},"complexity_factors":["Narrow technical scope: applies only to Kitfox series aeroplanes with aluminium fuel tanks (Applicability).","Simple required action: a single, clearly defined visual inspection for leakage (Requirement).","High frequency of compliance: inspection required before and after each flight, producing recurring burden (Compliance).","Flexible performer: pilot in command may perform and certify the inspection, which alters who conducts the check (Compliance; Note).","Administrative recording: mandatory entry on Maintenance Release and requirement to carry a copy of the directive (Compliance; Note).","Exit pathway: inspections cease once aluminium tanks are replaced with fibreglass tanks, and manufacturer conversion program is noted as low-cost to operators (Compliance; Background)."],"plain_english_summary":"- What this instrument does (mechanics):\n  - Applies to Kitfox series aeroplanes that are fitted with aluminium fuel tanks (Applicability).\n  - Requires a visual inspection of the aluminium fuel tanks for any signs of fuel leakage (Requirement).\n  - Inspections must be done before and after each flight, and must continue until the aluminium tanks are replaced with fibreglass tanks (Compliance).\n  - The directive must be recorded on the aircraft's Maintenance Release as maintenance required; a copy of the directive must be carried in the aircraft (Compliance, Note).\n  - The pilot in command may perform the required visual inspection; if the pilot performs it, the pilot signs the daily inspection certification on the Maintenance Release by entering AD/KITFOX/3 (Compliance, Note).\n\n- Official stated purpose: The background states the directive responds to reports of fuel leakage from the leading edge area of in-service six-gallon aluminium wing tanks; the manufacturer has started a tank-conversion program at minimal cost to the operator (Background). Those are the stated factual reasons for the directive.\n\n- Who pays / who acts:\n  - Aircraft operators (owners or operators of Kitfox aeroplanes with aluminium tanks) bear the ongoing compliance cost: time for visual inspections before and after each flight and the administrative step of entering the directive on the Maintenance Release (Requirement; Compliance; Note).\n  - Replacement with fibreglass tanks ends the inspection requirement; the Background records that the manufacturer has initiated a conversion program \"at minimal cost to the operator,\" indicating conversion costs fall primarily to operators but are intended to be small (Background).\n  - The pilot in command has the authority to perform and certify the inspections, shifting some routine compliance activity to flight crew rather than to licensed maintenance personnel (Compliance; Note).\n\n- Behavioural and administrative changes required:\n  - Pilots must inspect aluminium tanks visually before and after each flight and certify that inspection on the Maintenance Release (Requirement; Compliance; Note).\n  - A copy of the Airworthiness Directive must be carried in the aircraft (Compliance; Note).\n  - Operators can remove the repeated-inspection obligation by replacing aluminium tanks with fibreglass tanks; until replacement, inspections remain mandatory (Compliance).\n\n- Compliance burden, incentives and trade-offs:\n  - Frequency and timing: the requirement to inspect before and after every flight creates a recurring time cost for each flight operation (Compliance).\n  - Method and detection: the required check is a visual inspection only, so detection of leakage depends on what a visual check can reveal and on the skill and diligence of whoever performs it (Requirement; Compliance; Note).\n  - Administrative burden: the directive must be entered on the Maintenance Release and a copy carried in the aircraft, creating recordkeeping and documentary obligations (Compliance; Note).\n  - Incentives for replacement: operators who accept or pay for the fibreglass conversion avoid the recurring inspection burden; the Background notes the manufacturer is offering conversion at minimal cost to operators, which lowers that option's effective cost (Background).\n\n- Implementation and practical risks to watch for (mechanisms, not judgments):\n  - The inspections are visual and may depend on the pilot's ability to detect small leaks or early deterioration (Requirement; Compliance; Note).\n  - Shifting inspection responsibility to the pilot in command centralises routine checks with flight crew, which changes who performs and certifies the maintenance-related check (Compliance; Note).\n\n- Where the directive changes resource allocation: time currently spent on pre-/post-flight checks increases; money may be spent on conversion to fibreglass tanks if operators choose to eliminate the recurring inspections. The manufacturer conversion program is described as having minimal cost to the operator, which reduces the upfront financial barrier to replacement (Background).\n\n(References in parentheses refer to the heading in the source text that states the point: Applicability; Requirement; Compliance; Note; Background.)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific known defect in specific aircraft. It has not expanded beyond its original purpose of addressing aluminium fuel tank leaks in Kitfox aircraft."},"complexity_factors":["Very short document (under 200 words)","Only 1 substantive requirement (visual inspection)","No defined terms section","No cross-references to other legislation (only references a manufacturer's service bulletin)","Simple conditional logic: 'until replaced with fibreglass tanks'","Single applicability criterion (models with aluminium fuel tanks)"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — essentially a mandatory safety notice issued by Australia's aviation safety regulator (CASA) for specific Kitfox aircraft.\n\n**Who it affects:** Owners and operators of Kitfox Series aeroplanes that have **aluminium fuel tanks** (not fibreglass ones).\n\n**What it requires:**\n- **Before and after every single flight**, you must visually check the aluminium fuel tanks for fuel leaks.\n- This continues until you replace the aluminium tanks with fibreglass ones.\n- The manufacturer (Denney Aircraft) has a cheap conversion program to swap to fibreglass tanks.\n\n**How to comply:**\n- The pilot can do this visual check themselves — no mechanic required.\n- You must write \"AD/KITFOX/3\" on the Maintenance Release (the aircraft's official logbook) in the daily inspection section.\n- Keep a copy of this directive in the aircraft at all times.\n\n**Why it matters:** Aluminium wing tanks in these planes have been leaking fuel from the leading edge area — a serious fire and safety risk. This rule ensures leaks are caught immediately while pushing operators toward a permanent fix."}},"importantCases":[],"_links":{"self":"/api/acts/ad-kitfox-3-aluminium-fuel-tanks","history":"/api/acts/ad-kitfox-3-aluminium-fuel-tanks/history","analysis":"/api/acts/ad-kitfox-3-aluminium-fuel-tanks/analysis","conflicts":"/api/acts/ad-kitfox-3-aluminium-fuel-tanks/conflicts","importantCases":"/api/acts/ad-kitfox-3-aluminium-fuel-tanks/important-cases","documents":"/api/acts/ad-kitfox-3-aluminium-fuel-tanks/documents"}}