{"id":"F2006B08253","name":"AD/CESSNA 337/8 - Fuel Quantity Gauge Cooling - Modification","slug":"ad-cessna-337-8-fuel-quantity-gauge-cooling-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115553,"registerId":"commonwealth-F2006B08253-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 337/8 - 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 337 Series Aeroplanes\n\n \n\nAD/CESSNA 337/8 Fuel Quantity Gauge Cooling - Modification 5/71\n\nApplicability: All models with S/Nos. 337-0001 to 337-1193. 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":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD text itself sets a single, targeted requirement for Cessna 337 aeroplanes within a defined serial-number range to receive a specified modification per Cessna SL ME70-24 within a defined compliance window. The document contains no indication that the scope has been altered from its original expressed requirement."},"complexity_factors":["Narrow, clearly defined applicability by serial number (limited scope).","Single specific required action referenced (modification) rather than multiple or conditional obligations.","Compliance deadline specified as a simple hours-based window (200 hours after 31 May 1971).","Key technical detail and procedure are in an external document (Cessna SL ME70-24), so implementers must obtain and follow that document.","No stated exemptions, alternatives, or delegated discretion in the AD text (straightforward compliance path)."],"plain_english_summary":"This AD mandates a modification to fuel quantity gauge cooling on Cessna 337 aircraft serials 337‑0001 through 337‑1193, to be done per Cessna Service Letter SL ME70‑24 within 200 hours TIS after 31 May 1971. It binds owners/operators to schedule and fund the work; the AD cites the change but does not quantify costs, safety benefits, or provide alternatives."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive from 1971 addressing a specific technical defect in a specific aircraft model range. The scope remains precisely limited to the fuel gauge cooling modification for early production Cessna 337 aircraft. No scope creep is evident."},"complexity_factors":["Extremely short document (approximately 100 words of substantive content)","Only one defined term implicitly referenced (\"time in service\")","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Simple conditional logic: single applicability criterion (serial number range) and single compliance deadline","No nested exceptions or conditional sub-clauses","Single technical reference document (Cessna Service Letter ME70-24) — external technical standard, not legislative cross-reference"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific Cessna 337 aircraft.\n\n**What it requires:** Owners and operators of Cessna 337 series aeroplanes with serial numbers 337-0001 through 337-1193 must modify the fuel quantity gauge cooling system. This modification is detailed in Cessna Service Letter ME70-24.\n\n**Who must comply:** Anyone operating these specific Cessna 337 aircraft (twin-boom push-pull engine configuration, often called \"Skymaster\").\n\n**When:** The work must be completed within 200 hours of flight time after 31 May 1971.\n\n**Why it matters:** This addresses a safety defect in the fuel gauge cooling system. Without the modification, the fuel quantity gauges could overheat or malfunction, potentially leading to inaccurate fuel readings — a serious flight safety risk since pilots rely on accurate fuel data for flight planning and emergency decisions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-337-8-fuel-quantity-gauge-cooling-modification","history":"/api/acts/ad-cessna-337-8-fuel-quantity-gauge-cooling-modification/history","analysis":"/api/acts/ad-cessna-337-8-fuel-quantity-gauge-cooling-modification/analysis","conflicts":"/api/acts/ad-cessna-337-8-fuel-quantity-gauge-cooling-modification/conflicts","importantCases":"/api/acts/ad-cessna-337-8-fuel-quantity-gauge-cooling-modification/important-cases","documents":"/api/acts/ad-cessna-337-8-fuel-quantity-gauge-cooling-modification/documents"}}