{"id":"F2006B10143","name":"AD/GA-7/1 - Fuel Selector Valves - Replacement","slug":"ad-ga-7-1-fuel-selector-valves-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55718,"registerId":"commonwealth-F2006B10143-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GA-7/1 - Fuel Selector Valves - Replacement","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)  Gulfstream (Grumman American) GA-7 Series Aeroplanes\n\n \n\nAD/GA-7/1 Fuel Selector Valves - Replacement NK\n\nApplicability: Model GA-7 with S/Nos GA7-0002, GA7-0003, GA7-0005 to GA7-0028, GA7-0030, GA7-0034, GA7-0038 and GA7- 0039.\n\n \n\nDocument: Grumman American SB No. ME-10.\n\n \n\nCompliance: Within 25 hours time in service after 12 October 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\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Based solely on the text provided, the AD's scope is explicit and narrow: it requires replacement of fuel selector valves on the enumerated GA-7 serial numbers within a stated time window and directs compliance with Grumman American SB No. ME-10 (Applicability; Document; Compliance). There is no indication in the instrument that the scope was broadened or altered from its explicit terms."},"complexity_factors":["Narrow applicability limited to a small list of GA-7 serial numbers (Applicability) — reduces legal scope complexity.","Very short and specific compliance timeframe (25 hours TIS after 12 October 1978) creates operational urgency but is administratively simple to state (Compliance).","Dependence on an external technical document (Grumman American SB No. ME-10) for the procedural steps requires access to and interpretation of that bulletin (Document).","Safety-critical mechanical work implies technical complexity for implementers (maintenance shops) even though the AD text is brief (Document).","The AD does not set out alternative compliance routes, approvals, or exemptions in the provided text, so implementers must follow the SB as the prescribed method (Compliance; Document)."],"plain_english_summary":"This Airworthiness Directive requires replacement of fuel selector valves on specified Gulfstream (Grumman American) GA‑7 aircraft, performed per Grumman American Service Bulletin No. ME‑10, within 25 hours TIS after 12 October 1978. It directly affects the listed owners/operators and maintenance providers; they must fund and schedule the work promptly, causing short-term downtime to meet the tight compliance window and restore regulatory compliance."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a historical Airworthiness Directive from 1978 with a narrow, specific scope (fuel valve replacement on particular aircraft). It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, discrete requirement with no conditional logic or exceptions","Only 11 specific serial numbers affected — no broad classes or definitions","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Simple compliance deadline: fixed date plus hours-in-service calculation","No interpretation section, no defined terms, no nested provisions","Total length: approximately 150 words"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires specific repairs or modifications to aircraft.\n\n**What it does:** It orders owners and operators of certain **Gulfstream GA-7 series aeroplanes** (specific serial numbers listed) to **replace their fuel selector valves**. The replacement must follow the manufacturer's Service Bulletin ME-10.\n\n**Who it affects:** Owners and operators of GA-7 aircraft with serial numbers: GA7-0002, GA7-0003, GA7-0005 through GA7-0028, GA7-0030, GA7-0034, GA7-0038, and GA7-0039.\n\n**Why it matters:** Fuel selector valves control which fuel tank supplies the engine. A faulty valve could cause fuel starvation, engine failure, or fire — so this directive prevents potentially catastrophic accidents.\n\n**The deadline:** The replacement had to be completed within **25 hours of flight time** after 12 October 1978.\n\n**Key point:** This is a **one-off, specific safety fix** — not ongoing legislation. It applies only to the listed aircraft and was time-limited."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ga-7-1-fuel-selector-valves-replacement","history":"/api/acts/ad-ga-7-1-fuel-selector-valves-replacement/history","analysis":"/api/acts/ad-ga-7-1-fuel-selector-valves-replacement/analysis","conflicts":"/api/acts/ad-ga-7-1-fuel-selector-valves-replacement/conflicts","importantCases":"/api/acts/ad-ga-7-1-fuel-selector-valves-replacement/important-cases","documents":"/api/acts/ad-ga-7-1-fuel-selector-valves-replacement/documents"}}