{"id":"F2006B05056","name":"AD/CESSNA 180/43 - Fuel Quantity Placard","slug":"ad-cessna-180-43-fuel-quantity-placard","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44966,"registerId":"commonwealth-F2006B05056-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 180/43 - Fuel Quantity Placard","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)  \nCessna 180, 182 and Wren 460 Series Aeroplanes\n\nAD/CESSNA 180/43 Fuel Quantity Placard 4/76\n\nApplicability: As detailed in Requirement Document.\n\nRequirement: Install fuel quantity placards as detailed in Cessna SL SE75-7 and Supplement No. 1\\. Compliance: Cessna 180\n\n    Model 180 with S/Nos. as detailed in Cessna SL SE75-7 \\- within 100 hours time in service after 16 April 1976.\n\n    2. Model 180 with S/Nos. prior to 52364:\n\n    (a) if currently fitted with one or more replacement fuel cells bearing a manufacturing date of June 1973 or later \\- within 100 hours time in service after 16 April 1976.\n\n    (b) Concurrent with fitting one or more replacement fuel cells bearing a manufacturing date of June 1973 or later.\n\nCessna 182\n\n    3. Model 182 with S/Nos. as detailed in Cessna SL SE75-7 \\- within 100 hours time in service after 16 April 1976.\n\n    4. Model 182 with S/Nos. prior to 62251:\n\n    (a) if currently fitted with one or more replacement fuel cells bearing a manufacturing date of June 1973 or later \\- within 100 hours time in service after 31 March 1976.\n\n    (b) Concurrent with fitting one or more replacement fuel cells bearing a manufacturing date of June 1973 or later.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused specifically on fuel placard installation for three aircraft models. It has not expanded beyond its original narrow technical purpose."},"complexity_factors":["Multiple conditional compliance paths based on aircraft model (180 vs 182)","Serial number thresholds creating different obligations (52364 for 180s, 62251 for 182s)","Nested conditions: compliance timing depends on both serial number AND whether replacement fuel cells with specific manufacturing dates (June 1973 or later) are installed","Reference to external documents (Cessna Service Letter SE75-7 and Supplement No. 1) for actual technical requirements","Two different deadline dates (16 April 1976 vs 31 March 1976) for similar aircraft categories","Cross-reference to 'Requirement Document' for full applicability list not reproduced in the directive itself"],"plain_english_summary":"Owners/operators of certain Cessna 180, 182 and Wren 460 series aircraft (specific serial numbers, especially those with replacement fuel cells from June 1973 onward) must install fuel quantity warning placards exactly as Cessna Service Letter SE75-7 and its Supplement No.1 specify.\n\nCompliance deadlines vary by model/serial: some within 100 flight hours after April 1976, others when the fuel cell is next replaced. The placards reduce risk of misreading fuel levels and help prevent fuel-exhaustion accidents."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive, as written, imposes placard-installation requirements on specified aircraft by model, serial number and by the presence or fitting of replacement fuel cells dated June 1973 or later. The text does not state or show that it alters an earlier scope; it defines scope through those serial-number/date conditions and relies on external service documents for implementation detail. The header’s reference to Wren 460 creates an internal ambiguity but does not, within this text, indicate a changed regulatory scope."},"complexity_factors":["Conditional applicability based on model and serial-number ranges (different S/N cutoffs for 180 and 182 models).","Additional conditionality tied to replacement fuel cells bearing a manufacture date (June 1973) which creates concurrent and retroactive triggers.","Multiple compliance deadlines (generally 100 hours in service) tied to different calendar dates for different conditions.","Dependency on external documents (Cessna SL SE75-7 and Supplement No.1) for the placard specification and positioning.","Header mentions Wren 460 Series while the detailed requirements list only Cessna 180/182, producing a potential ambiguity.","Applicability phrase 'As detailed in Requirement Document' requires cross-reference to another document to resolve full scope."],"plain_english_summary":"This airworthiness directive requires installation of fuel-quantity placards on specified Cessna 180 and 182 aircraft (the Wren 460 is mentioned in the header) in accordance with Cessna Service Letter SE75-7 and its Supplement No.1. Owners/operators of affected aircraft must fit the placards either within the stated flight‑hour deadlines (generally within 100 hours after the listed dates) or at the time replacement fuel cells (manufactured June 1973 or later) are fitted, so compliance responsibility and fitting costs fall to them."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-180-43-fuel-quantity-placard","history":"/api/acts/ad-cessna-180-43-fuel-quantity-placard/history","analysis":"/api/acts/ad-cessna-180-43-fuel-quantity-placard/analysis","conflicts":"/api/acts/ad-cessna-180-43-fuel-quantity-placard/conflicts","importantCases":"/api/acts/ad-cessna-180-43-fuel-quantity-placard/important-cases","documents":"/api/acts/ad-cessna-180-43-fuel-quantity-placard/documents"}}