{"id":"F2006B02028","name":"AD/AA-1/17 - Fuel Gauges Visibility - Modification","slug":"ad-aa-1-17-fuel-gauges-visibility-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41250,"registerId":"commonwealth-F2006B02028-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AA-1/17 - Fuel Gauges Visibility - 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 8/1978,Aircraft below 5700 kg,Gulfstream (Grumman American/ American Aviation) AA-1 Series Aeroplanes,Fuel Gauges Visibility - Modification,17\ntitle: Airworthiness Directive - AD/AA-1/17 - Fuel Gauges Visibility - 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-1/17 Fuel Gauges Visibility - Modification 8/78\n\nApplicability: Models AA-1 and AA-1A, all S/Nos. Model AA-1B with S/Nos. AA-1B0001 to AA- 1B0542.\n\n \n\nDocument: 1. Grumman American SL No. 75-7; or\n\n \n\n2. FAA AD 78-13-04, Amendment 39-3247.\n\n \n\nCompliance: Within 200 hours time in service after 30 September 1978.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue safety directive focused specifically on fuel gauge visibility modifications for one aircraft series. It has not expanded beyond its original narrow technical purpose."},"complexity_factors":["Extremely short document (under 200 words)","Only 3 defined applicability criteria (model numbers and serial number ranges)","Single compliance requirement with clear deadline","No nested conditions, exceptions, or cross-references to other legislation sections","References only external technical documents for implementation details rather than embedding complex technical specifications"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) issued by Australia's Civil Aviation Safety Authority (CASA). An AD is a mandatory safety order — think of it as a recall notice for aircraft. It requires owners or operators of specific planes to make a physical change (modification) to improve safety.\n\n**Who it affects:** Owners and operators of specific light aircraft: the Gulfstream (formerly Grumman American/American Aviation) AA-1 series. Specifically:\n- All AA-1 and AA-1A models (any serial number)\n- AA-1B models with serial numbers from AA-1B0001 through AA-1B0542\n\nThese are small, single-engine planes typically used for private flying and flight training, weighing less than 5,700 kg.\n\n**What it requires:** The aircraft must be modified to improve the **visibility of the fuel gauges**. The exact technical details of the modification are found in two reference documents (a manufacturer service letter or a US Federal Aviation Administration directive). The modification must be completed within 200 hours of flying time after 30 September 1978.\n\n**Why it matters:** Poor fuel gauge visibility could lead to pilots misreading how much fuel remains — a potentially deadly error. This directive forces a fix to prevent fuel starvation accidents."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive’s scope as presented is limited to the listed AA-1 series models and serial-number range and to the single compliance requirement referencing two specific technical documents. There is no indication in the supplied text that the scope differs from that stated: affected aircraft are those listed (Applicability), the modification method is those referenced documents (Document), and the deadline is 200 hours TIS after 30 September 1978 (Compliance)."},"complexity_factors":["Narrow, specific applicability (models AA-1, AA-1A all S/Ns; AA-1B S/Ns AA-1B0001–AA-1B0542) increases clarity but requires serial-number checks (Applicability).","Required actions are specified only by reference to external technical documents (Grumman American SL No. 75-7 or FAA AD 78-13-04), so implementers must obtain and interpret those documents to perform the work (Document).","Compliance is measured in aircraft hours-in-service (200 hours after 30 September 1978), requiring operational record checks and scheduling (Compliance).","The AD text supplied does not include procedural detail, alternative compliance procedures, or administrative exemptions, shifting interpretation and administrative discretion to the referenced documents and the broader regulatory framework (header; Document)."],"plain_english_summary":"This AD mandates a fuel‑gauge visibility modification for specified Gulfstream (Grumman American) AA‑1 series aeroplanes, to be done per Grumman American Service Letter No. 75‑7 or FAA AD 78‑13‑04. Affected owners/operators must complete the work within 200 hours time‑in‑service after 30 September 1978, bearing the costs and arranging maintenance to the referenced standard."}},"importantCases":[],"_links":{"self":"/api/acts/ad-aa-1-17-fuel-gauges-visibility-modification","history":"/api/acts/ad-aa-1-17-fuel-gauges-visibility-modification/history","analysis":"/api/acts/ad-aa-1-17-fuel-gauges-visibility-modification/analysis","conflicts":"/api/acts/ad-aa-1-17-fuel-gauges-visibility-modification/conflicts","importantCases":"/api/acts/ad-aa-1-17-fuel-gauges-visibility-modification/important-cases","documents":"/api/acts/ad-aa-1-17-fuel-gauges-visibility-modification/documents"}}