{"id":"F2006B10144","name":"AD/GA-7/10 - Fuel Tanks","slug":"ad-ga-7-10-fuel-tanks","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55719,"registerId":"commonwealth-F2006B10144-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GA-7/10 - Fuel Tanks","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nGulfstream (Grumman American) GA-7 Series Aeroplanes\n\nAD/GA-7/10 Fuel Tanks 2/90\n\nApplicability: Model GA 7.\n\nRequirement: Inspect the fuel tanks, fuel system, and the electric fuel pump filter for fuel tank sealant contamination in accordance with the instructions specified in Gulfstream Aerospace Corporation Service Bulletin No ME 22.\n\nNote: FAA AD 89-18-08 Amdt 39-6307 refers.\n\nCompliance: Prior to the issue of the next Maintenance Release after 30 April 1990.\n\nBackground: Integral fuel tanks were sealed at manufacture with sealant which has since been determined to be unsuitable for use in a high- octane fuel environment. Fuel Tank Repair Service Kit No SK-1 also specified the use of this sealant, but was subsequently reissued containing the correct sealant as Kit No SK-1A. The requirement of this AD will ensure against possible fuel contamination and/or flow interruption to the engine.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive does not expand or narrow its target beyond the original operational group identified: Model GA-7 aeroplanes. It prescribes a single inspection obligation and a compliance deadline to address contamination risk from a specific sealant (\"Applicability\", \"Requirement\", \"Compliance\", \"Background\"). The AD relies on the manufacturer service bulletin for procedure and references the corrected repair kit SK-1A; it therefore implements the original intent (remove or identify unsuitable sealant and prevent fuel contamination/flow interruption) without broadening the affected fleet or adding unrelated obligations."},"complexity_factors":["Narrow applicability — only Model GA-7 aeroplanes (\"Applicability\")","Single, specific action required (inspect fuel tanks, fuel system, and electric fuel pump filter) rather than multiple, layered obligations (\"Requirement\")","Clear compliance timing tied to a maintenance milestone (next Maintenance Release after 30 April 1990) (\"Compliance\")","Procedural dependence on an external manufacturer document (Gulfstream Service Bulletin No ME 22) introduces modest complexity because operators must obtain and follow that bulletin (\"Requirement\")","Background technical detail (incorrect sealant and revised kit SK-1A) adds operational context but does not expand regulatory duties (\"Background\")"],"plain_english_summary":"This AD requires owners/operators of Gulfstream GA-7 aeroplanes to inspect fuel tanks, the fuel system and electric fuel pump filter for contamination from an unsuitable tank sealant, following Gulfstream Service Bulletin No ME 22. \n\nIt affects aircraft owners, maintenance organisations and mechanics; it matters because contaminated sealant could disrupt fuel flow to the engines. Operators must complete the inspection (and any corrective work) before issuing the next Maintenance Release after 30 April 1990, at their own cost."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific manufacturing defect. It has not expanded beyond its original purpose of mandating inspection for sealant contamination in GA-7 fuel tanks."},"complexity_factors":["Single, specific aircraft model (GA-7) with narrow applicability","One clear requirement: inspect per referenced service bulletin","Single compliance deadline tied to Maintenance Release cycle","No defined terms section — uses plain aviation terminology","No nested exceptions or conditional logic","Cross-reference to FAA AD 89-18-08 is informational only, not operative","Total length: approximately 150 words"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of **Gulfstream GA-7 series aeroplanes** to inspect their fuel tanks, fuel system, and electric fuel pump filter for contamination from faulty sealant.\n\n**Why it matters:**\nThe original sealant used in these aircraft (and in an early repair kit) breaks down in high-octane fuel. This can contaminate the fuel or block fuel flow to the engine — a serious flight safety risk.\n\n**Who must comply:**\nAnyone operating a **Model GA-7** aircraft. They must complete this inspection **before the next Maintenance Release is issued after 30 April 1990**.\n\n**What action is required:**\nFollow the specific inspection instructions in **Gulfstream Service Bulletin ME 22** to check for sealant contamination.\n\n**Key background:**\n- The original sealant was unsuitable for high-octane fuel\n- Repair Kit SK-1 was recalled and replaced with SK-1A containing correct sealant\n- This directive prevents potential engine fuel starvation or contamination"}},"importantCases":[],"_links":{"self":"/api/acts/ad-ga-7-10-fuel-tanks","history":"/api/acts/ad-ga-7-10-fuel-tanks/history","analysis":"/api/acts/ad-ga-7-10-fuel-tanks/analysis","conflicts":"/api/acts/ad-ga-7-10-fuel-tanks/conflicts","importantCases":"/api/acts/ad-ga-7-10-fuel-tanks/important-cases","documents":"/api/acts/ad-ga-7-10-fuel-tanks/documents"}}