{"id":"F2006B04898","name":"AD/CESSNA 120/10 - Fuel selector valve","slug":"ad-cessna-120-10-fuel-selector-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44723,"registerId":"commonwealth-F2006B04898-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)  \n\nCessna 120 and 140 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/CESSNA 120/10 Fuel Selector Valve 6/2","sectionType":"part","heading":"AD/CESSNA 120/10 Fuel Selector Valve 6/2003","content":"# AD/CESSNA 120/10 Fuel Selector Valve 6/2003\n\nApplicability: Cessna 120 and 140 aircraft serial numbers 8001-8480 inclusive. Requirement: 1. If fitted remove the embossed pointer from the fuel selector handle.\n\n2. Verify that the fuel selector handle is installed so that the handle indicates correctly the position of the selector valve as shown by the valve placard.\n\nNote: FAA AD 47-43-02 refers.\n\nCompliance: Unless previously accomplished within 100 flight hours or twelve months from the effective date of this directive.\n\nThis Airworthiness Directive becomes effective on 12 June 2003.\n\nBackground: The embossed pointer fitted to the fuel selector handle can lead to confusion when operating the selector valve. This directive requires the removal of the embossed pointer and a check to ensure the valve operates as per the cockpit placard.\n\n![](image.002.png)  \n\nJim Coyne\n\nDelegate of the Civil Aviation Safety Authority 17 April 2003\n\n![](image.001.png)","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's scope aligns with its stated purpose in the Background: it targets a specific mis‑indication risk for Cessna 120/140 aircraft serials 8001–8480. Obligations are narrow (remove pointer if fitted; verify handle), time‑limited, and do not broaden to other models or additional modifications."},"complexity_factors":["Narrow applicability: limited to Cessna 120 and 140 serial numbers 8001–8480 (Applicability).","Simple prescriptive actions: removal of an embossed pointer and verification of handle indication (Requirement 1–2).","Conditional obligation: work required only 'if fitted' which reduces universality but requires initial inspection (Requirement 1).","Fixed compliance window: 100 flight hours or 12 months creates a clear deadline (Compliance).","Limited procedural detail: directive instructs removal and verification but does not specify method or authorised person, leaving maintenance judgement/choice (Requirement).","Regulatory basis noted: issued under subregulation 39.1(1) of CASR 1998, which determines who may direct the action (preamble).","Cross-reference to FAA AD 47-43-02 may require operators to consult external material for context (Note)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Cessna 120 and 140 aeroplanes (serial numbers 8001–8480) to remove an embossed pointer from the fuel selector handle if fitted and to verify the handle correctly indicates valve position. Compliance is required within 100 flight hours or 12 months; it is issued by the CASA delegate under subregulation 39.1(1).\n\nOwners/operators pay for removal and inspection; the directive is motivated by a reported mis‑indication risk and refers to FAA AD 47‑43‑02."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive with a narrow, specific safety purpose—addressing a known hazard with fuel selector valve indicators on particular Cessna aircraft. The scope remains tightly focused on the original safety issue without expansion into broader operational or maintenance requirements."},"complexity_factors":["Very short document (approximately 250 words)","Only 2 substantive requirements with clear conditional logic ('If fitted')","Single cross-reference to FAA AD 47-43-02 (informational only)","Simple applicability criteria (specific aircraft models and serial number range)","Straightforward compliance deadline (100 flight hours or 12 months)","No defined terms section or complex interpretation provisions"],"plain_english_summary":"This is a safety order (called an \"Airworthiness Directive\") issued by Australia's aviation safety regulator (CASA) for specific Cessna light aircraft models. It requires owners or operators of Cessna 120 and 140 planes (serial numbers 8001-8480) to remove a small embossed pointer from the fuel selector handle and verify that the fuel selector handle correctly indicates the valve's position as shown by the cockpit placard. The embossed pointer can cause confusion about whether the fuel is on or off, which could lead to engine failure. The work must be done within 100 flight hours or 12 months from when the directive took effect on 12 June 2003."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-120-10-fuel-selector-valve","history":"/api/acts/ad-cessna-120-10-fuel-selector-valve/history","analysis":"/api/acts/ad-cessna-120-10-fuel-selector-valve/analysis","conflicts":"/api/acts/ad-cessna-120-10-fuel-selector-valve/conflicts","importantCases":"/api/acts/ad-cessna-120-10-fuel-selector-valve/important-cases","documents":"/api/acts/ad-cessna-120-10-fuel-selector-valve/documents"}}