{"id":"F2006B06242","name":"AD/PITTS S-2/13 - Fuselage Mounted Main Fuel Tank Filler Cap - Modification","slug":"ad-pitts-s-2-13-fuselage-mounted-main-fuel-tank-filler-cap-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47198,"registerId":"commonwealth-F2006B06242-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PITTS S-2/13 - Fuselage Mounted Main Fuel Tank Filler Cap - Modification","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)  Pitts S-1 and S-2 Series Aeroplanes\n\n \n\n# AD/PITTS S-2/13  Fuselage Mounted Main Fuel Tank Filler Cap - Modification\n\nApplicability: All model S-1 and S-2 series aeroplanes.\n\n# 4/84\n\n \n\nRequirement: Install a positive retention device for the main fuel tank cap using a means acceptable to the Secretary.\n\n \n\nCompliance: Before further flight after 30 June 1984.\n\n \n\nBackground: Engine failure from fuel exhaustion has occurred when the main fuel tank cap was lost in-flight.\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":1943},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: mandating a specific safety modification to prevent fuel cap loss on Pitts S-1 and S-2 aircraft. No expansion into unrelated operational or maintenance areas."},"complexity_factors":["Single-page instrument with only one substantive requirement","No definitions section or technical interpretation clauses","Straightforward applicability covering all models in the series","No cross-references to other legislative provisions","Simple compliance trigger (before next flight after specified date)"],"plain_english_summary":"This is a mandatory safety order (called an **Airworthiness Directive**) for anyone who owns or operates a **Pitts S-1 or S-2 series aeroplane**—these are small, aerobatic biplanes commonly used for air shows and flight training.\n\n**What you must do:**\nInstall a safety lock or tether (a \"positive retention device\") on the main fuel tank filler cap to prevent it from falling off during flight.\n\n**Why this matters:**\nIf the fuel cap comes loose in mid-air, fuel can leak out, causing the engine to stop working from fuel exhaustion. This has caused actual accidents and forced landings.\n\n**Approval required:**\nThe installation method must be approved by the aviation regulator (referred to as the \"Secretary\")."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pitts-s-2-13-fuselage-mounted-main-fuel-tank-filler-cap-modification","history":"/api/acts/ad-pitts-s-2-13-fuselage-mounted-main-fuel-tank-filler-cap-modification/history","analysis":"/api/acts/ad-pitts-s-2-13-fuselage-mounted-main-fuel-tank-filler-cap-modification/analysis","conflicts":"/api/acts/ad-pitts-s-2-13-fuselage-mounted-main-fuel-tank-filler-cap-modification/conflicts","importantCases":"/api/acts/ad-pitts-s-2-13-fuselage-mounted-main-fuel-tank-filler-cap-modification/important-cases","documents":"/api/acts/ad-pitts-s-2-13-fuselage-mounted-main-fuel-tank-filler-cap-modification/documents"}}