{"id":"F2006B02039","name":"AD/AA-1/8 - Fuel Quantity Indicator - Modification","slug":"ad-aa-1-8-fuel-quantity-indicator-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41261,"registerId":"commonwealth-F2006B02039-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AA-1/8 - Fuel Quantity Indicator - Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue NK,Aircraft below 5700 kg,Gulfstream (Grumman American/ American Aviation) AA-1 Series Aeroplanes,Fuel Quantity Indicator - Modification,8\ntitle: Airworthiness Directive - AD/AA-1/8 - Fuel Quantity Indicator - Modification\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)  Gulfstream (Grumman American/ American Aviation) AA-1 Series Aeroplanes\n\n \n\nAD/AA-1/8 Fuel Quantity Indicator - Modification NK\n\nApplicability: All models.\n\n \n\nRequirement: Fit a clear perspex protection cover over the glass tube of the fuel quantity indicators. Compliance:              Within 100 hours time in service after 31 July 1972.\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":2008},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: mandating a specific physical safety modification to fuel quantity indicators on AA-1 series aircraft only."},"complexity_factors":["Single, unambiguous mechanical requirement with no conditional logic","No defined terms, cross-references to other legislation, or interpretive provisions","No exemptions, exceptions, or alternative compliance methods specified","Extremely brief operative text consisting of one sentence of instruction"],"plain_english_summary":"**What this does:** Requires a safety modification to prevent fuel gauge damage on specific light aircraft.\n\n**Who it affects:** Owners and operators of Gulfstream AA-1 series aeroplanes (small single-engine aircraft weighing less than 5,700 kg).\n\n**What you must do:** Install a clear perspex (acrylic plastic) protective cover over the glass tubes of the fuel quantity indicators. This physical barrier prevents the glass from being struck or broken during normal operations.\n\n**Deadline:** The modification must be completed within 100 hours of flight time (called \"time in service\") after 31 July 1972.\n\n**Why it matters:** Broken fuel gauge glass can cause fuel leaks or prevent pilots from knowing how much fuel remains—both serious flight safety hazards. This simple cover prevents that risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-aa-1-8-fuel-quantity-indicator-modification","history":"/api/acts/ad-aa-1-8-fuel-quantity-indicator-modification/history","analysis":"/api/acts/ad-aa-1-8-fuel-quantity-indicator-modification/analysis","conflicts":"/api/acts/ad-aa-1-8-fuel-quantity-indicator-modification/conflicts","importantCases":"/api/acts/ad-aa-1-8-fuel-quantity-indicator-modification/important-cases","documents":"/api/acts/ad-aa-1-8-fuel-quantity-indicator-modification/documents"}}