{"id":"F2006B04971","name":"AD/CESSNA 170/43 - Fuel Quantity Placarding","slug":"ad-cessna-170-43-fuel-quantity-placarding","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44856,"registerId":"commonwealth-F2006B04971-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 170/43 - Fuel Quantity Placarding","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 170, 172, F172, FR172 and 175 Series Aeroplanes\n\nAD/CESSNA 170/43 Fuel Quantity Placarding 9/81\n\nApplicability: Models 172N and 172P with S/Nos. 17272885 to 17274357. Model R172K with S/Nos. R1723200 to R1723403. Model 172RG with S/Nos. 172RG0001 to 172RG0698.\n\nRequirement: 1. With reference to Fig. 1, identify the correct fuel tank cover for the aircraft.\n\n    2. Inspect the placarding adjacent to the fuel filler openings to verify that the markings agree with the actual tank capacity Fig. 1.\n\n    3. Inspect the fuel gauge markings and the placard adjacent to fuel selector valve to verify that the markings agree with the usuable fuel quantities for the tanks installed.\n\n    4. Replace any incorrectly marked fuel gauge, fuel selector valve placard or fuel tank filler placard with one compatible with correct fuel tank capacity.\n\nAccess Cover Model Fuel Tank Capacity\n\n  \nUsable Fuel\n\n![](image.002.png)172RG R172K 172P\n\n![](image.003.png)152 & A152\n\n172N & 172P\n\n![](image.004.png)R172K\n\n152 & A152\n\n172N & 172P\n\n  \n33/Side 34/Side 34/Side\n\n13/Side 21.5/Side\n\n26/Side 19.5/Side 27/Side\n\n  \n62 Gallons\n\n62 Gallons\n\n62 Gallons\n\n24.5 Gallons 40 Gallons\n\n49 Gallons\n\n37.5 Gallons 50 Gallons\n\n(Left Side Shown \\- Right Side Opposite)\n\nFigure 1.\n\nNote: FAA AD 81-05-01, Amendment 39-4049 refers.\n\nCompliance: Within 100 hours time in service after 31 May 1981.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\nBackground: Incorrect fuel quantity markings may affect fuel endurance for flight planning purposes.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD’s operative scope — inspecting and correcting fuel quantity markings on specified Cessna models/serials within a set compliance period — matches the stated safety concern that incorrect markings may affect fuel endurance for flight planning (Applicability; Requirement 1–4; Compliance; Background)."},"complexity_factors":["Narrow applicability defined by model and serial-number ranges (Applicability).","Prescriptive, limited tasks: identify cover, inspect placards/gauges/selector, replace incorrect items (Requirement 1–4).","Dependence on a reference figure to match tank capacities to correct placards (Figure 1).","Short compliance window: within 100 hours time in service after 31 May 1981 (Compliance).","Possible logistical cost and parts replacement burden for aircraft owners/operators (Requirement 4).","Cross-reference to FAA AD 81-05-01 noted (Note)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specified Cessna 172/172RG/R172K serial-number ranges to inspect fuel filler covers, fuel-filler placards, fuel gauge markings and the fuel-selector valve placard, and to replace any items that are incorrectly marked (Requirement 1–4). Compliance is required within 100 hours time in service after 31 May 1981 (Compliance). The AD is issued because incorrect fuel markings may affect fuel endurance used in flight planning (Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope: correcting fuel placarding errors on specific Cessna aircraft models. The directive addresses exactly the safety issue identified (incorrect fuel quantity markings affecting flight planning) without expanding into broader operational requirements or additional aircraft types."},"complexity_factors":["Single, specific applicability limited to three aircraft models with defined serial number ranges","Four sequential procedural steps with no conditional branches or exceptions","One defined term ('usable fuel') implied but not explicitly defined in the text","Simple tabular reference (Figure 1) for cross-referencing tank capacities","No internal cross-references to other legislation sections","Single compliance deadline with straightforward calculation (100 hours time in service after fixed date)","Background statement provides clear rationale without legal caveats"],"plain_english_summary":"This CASA Airworthiness Directive orders owners/operators of certain Cessna 172, 172RG and R172K aircraft (specific serial ranges) to verify that fuel tank covers, filler-placards, gauge markings and selector valve labels correctly reflect actual and usable fuel capacity. It requires replacing any incorrect items within the compliance period. Ensuring accurate fuel information prevents miscalculation of range and reduces the risk of fuel exhaustion and forced landings."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-170-43-fuel-quantity-placarding","history":"/api/acts/ad-cessna-170-43-fuel-quantity-placarding/history","analysis":"/api/acts/ad-cessna-170-43-fuel-quantity-placarding/analysis","conflicts":"/api/acts/ad-cessna-170-43-fuel-quantity-placarding/conflicts","importantCases":"/api/acts/ad-cessna-170-43-fuel-quantity-placarding/important-cases","documents":"/api/acts/ad-cessna-170-43-fuel-quantity-placarding/documents"}}