{"id":"F2006B05310","name":"AD/CESSNA 208/3 - Fuel Reservoir Tank and Flapper Valve","slug":"ad-cessna-208-3-fuel-reservoir-tank-and-flapper-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45745,"registerId":"commonwealth-F2006B05310-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 208/3 - Fuel Reservoir Tank and Flapper Valve","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 208 Series Aeroplanes\n\n \n\nAD/CESSNA 208/3 Fuel Reservoir Tank and Flapper Valve 1/88\n\nApplicability: Model 208 and 208A, S/Nos 20800001 through 20800106. Requirement: Action in accordance with Cessna S.B. No CAB 87-13.\n\nCompliance: Prior to the issue of the next Maintenance Release after 28 February 1988.\n\n \n\nBackground: The manufacturer has determined that the fuel reservoir should be modified to prevent the flapper check valves from contacting surrounding hardware and lines.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":908},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific manufacturing defect in early production Cessna 208 aircraft. The scope remains precisely limited to the fuel reservoir modification described in the original issue."},"complexity_factors":["Very short single-page instrument with one operative requirement","Narrow applicability limited to specific serial number range (S/Nos 20800001 through 20800106)","Single external technical reference (Cessna Service Bulletin CAB 87-13) containing the actual modification instructions","No conditional logic, exceptions, or defined terms section"],"plain_english_summary":"**What this is:** An Airworthiness Directive (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority under the Civil Aviation Regulations.\n\n**What it requires:** Owners and operators of specific Cessna 208 Caravan aircraft (serial numbers 20800001 through 20800106) must modify the fuel reservoir tank to prevent the flapper check valves from bumping into surrounding hardware and fuel lines. This modification must be done exactly as described in Cessna Service Bulletin No. CAB 87-13.\n\n**Who it affects:** Anyone operating the early production Cessna 208 and 208A models listed above.\n\n**When it had to be done:** Before the aircraft's next Maintenance Release (a formal document certifying an aircraft is airworthy) issued after 28 February 1988.\n\n**Why it matters:** Contact between the flapper valves and surrounding components could damage the fuel system, potentially leading to fuel leaks or engine failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-208-3-fuel-reservoir-tank-and-flapper-valve","history":"/api/acts/ad-cessna-208-3-fuel-reservoir-tank-and-flapper-valve/history","analysis":"/api/acts/ad-cessna-208-3-fuel-reservoir-tank-and-flapper-valve/analysis","conflicts":"/api/acts/ad-cessna-208-3-fuel-reservoir-tank-and-flapper-valve/conflicts","importantCases":"/api/acts/ad-cessna-208-3-fuel-reservoir-tank-and-flapper-valve/important-cases","documents":"/api/acts/ad-cessna-208-3-fuel-reservoir-tank-and-flapper-valve/documents"}}