{"id":"F2006B08226","name":"AD/CESSNA 336/5 - Fuel Quantity Gauge Cooling - Modification","slug":"ad-cessna-336-5-fuel-quantity-gauge-cooling-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115469,"registerId":"commonwealth-F2006B08226-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 336/5 - Fuel Quantity Gauge Cooling - 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)  Cessna 336 Series Aeroplanes\n\n \n\nAD/CESSNA 336/5 Fuel Quantity Gauge Cooling - Modification 5/71\n\nApplicability: All models. Document: Cessna SL ME70-24.\n\nCompliance: Within 200 hours time in service after 31 May 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 \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a historical AD from 1971 (indicated by '5/71' in the reference number). It remains within its original narrow scope: mandating a specific hardware modification to address a known safety defect in a particular aircraft type. There is no evidence of scope creep — it does not expand to other aircraft types, add ongoing inspection requirements, or incorporate additional systems beyond the fuel gauge cooling modification originally identified."},"complexity_factors":["Extremely short document (under 100 words of substantive content)","No defined terms section","No cross-references to other legislation beyond the enabling regulation (CAR 1998 Part 39)","Simple unconditional directive: one applicability, one document reference, one compliance deadline","Single action required with clear metric (200 hours time in service)","No exceptions, exemptions, or conditional logic"],"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) that requires aircraft owners to fix a specific problem.\n\n**What it does:** It orders owners of **Cessna 336 series aeroplanes** (twin-engine push-pull aircraft) to modify the **fuel quantity gauge cooling system**. The fix is described in a Cessna Service Letter (SL ME70-24).\n\n**Who must comply:** Anyone who owns or operates a Cessna 336 aircraft in Australia.\n\n**The deadline:** The modification must be done **within 200 hours of flying time** after 31 May 1971.\n\n**Why it matters:** Fuel gauges that overheat can give false readings or fail completely. In a twin-engine aircraft, not knowing your actual fuel level is extremely dangerous — you could run out of fuel unexpectedly or have asymmetric fuel distribution affecting balance. This AD prevents potential fuel starvation accidents."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD text specifies a single mandatory modification for all Cessna 336 models and sets a fixed compliance window. The instrument itself does not indicate any expansion or contraction of scope relative to prior requirements; it establishes the modification requirement as stated (no changes to scope are described in the text)."},"complexity_factors":["Single, narrowly framed requirement (one modification) rather than a multi-part regulatory scheme","Applicability is universal within the model line: \"All models\" (no case-by-case eligibility rules)","Compliance is tied to a single, clear deadline: \"Within 200 hours time in service after 31 May 1971\"","Technical detail is delegated to an external document (Cessna SL ME70-24), limiting complexity in the AD text itself but requiring access to the service letter","No procedures for exemptions, alternatives, reporting, or enforcement are included in the text, reducing textual complexity but shifting operational complexity to compliance processes"],"plain_english_summary":"This Airworthiness Directive requires every Cessna 336 series aeroplane to receive the fuel quantity gauge cooling modification per Cessna SL ME70-24 within 200 hours time-in-service after 31 May 1971. The Civil Aviation Safety Authority mandates the work; aircraft owners/operators must arrange and bear whatever parts, labour and downtime are needed, as the AD specifies the action and deadline but not costs or alternatives."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-336-5-fuel-quantity-gauge-cooling-modification","history":"/api/acts/ad-cessna-336-5-fuel-quantity-gauge-cooling-modification/history","analysis":"/api/acts/ad-cessna-336-5-fuel-quantity-gauge-cooling-modification/analysis","conflicts":"/api/acts/ad-cessna-336-5-fuel-quantity-gauge-cooling-modification/conflicts","importantCases":"/api/acts/ad-cessna-336-5-fuel-quantity-gauge-cooling-modification/important-cases","documents":"/api/acts/ad-cessna-336-5-fuel-quantity-gauge-cooling-modification/documents"}}