{"id":"F2006B05229","name":"AD/CESSNA 206/25 - Fuel Vent Tube","slug":"ad-cessna-206-25-fuel-vent-tube","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45506,"registerId":"commonwealth-F2006B05229-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 206/25 - Fuel Vent Tube","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 206 Series Aeroplanes\n\n \n\nAD/CESSNA 206/25 Fuel Vent Tube 9/78\n\nApplicability: Model 206 with S/Nos. 20603522 to 20604211. Requirement:  Action in accordance with Cessna SL No. SE78-40. Compliance:               Within 100 hours time in service after 30 September 1978.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1347},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This remains a highly targeted technical safety notice addressing a specific mechanical defect in a limited production run of aircraft. The scope has not expanded beyond the original fuel vent tube issue for the specified serial numbers."},"complexity_factors":["Single requirement applying to a narrow, specifically identified range of aircraft by serial number","No defined terms or interpretation section","Only one external reference (Cessna Service Letter SE78-40)","Simple, unambiguous compliance deadline with no exceptions, extensions, or conditional logic","Document length of less than 100 words"],"plain_english_summary":"**What this is:** A mandatory safety directive (called an Airworthiness Directive) issued under the Civil Aviation Regulations 1998 that requires specific Cessna aircraft owners to fix a potential fuel vent tube problem.\n\n**Who it affects:** Owners and operators of **Cessna Model 206 aircraft** with serial numbers between **20603522 and 20604211**.\n\n**What it requires:** Affected aircraft must undergo maintenance or inspection of the fuel vent tube following the exact instructions in **Cessna Service Letter SE78-40**. This prevents potential fuel leaks or ventilation failures that could create fire or engine stoppage hazards.\n\n**When it had to be done:** Within **100 hours of flight time** after 30 September 1978. (This is a historical directive from 1978; any aircraft covered by this AD would have required compliance decades ago.)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-206-25-fuel-vent-tube","history":"/api/acts/ad-cessna-206-25-fuel-vent-tube/history","analysis":"/api/acts/ad-cessna-206-25-fuel-vent-tube/analysis","conflicts":"/api/acts/ad-cessna-206-25-fuel-vent-tube/conflicts","importantCases":"/api/acts/ad-cessna-206-25-fuel-vent-tube/important-cases","documents":"/api/acts/ad-cessna-206-25-fuel-vent-tube/documents"}}