{"id":"F2006B01838","name":"AD/A109/7 - Superflexit Fuel Tanks","slug":"ad-a109-7-superflexit-fuel-tanks","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41036,"registerId":"commonwealth-F2006B01838-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A109/7 - Superflexit Fuel Tanks","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 10/1986,Rotorcraft,Agusta A109 Series Helicopters,Superflexit Fuel Tanks,7\ntitle: Airworthiness Directive - AD/A109/7 - Superflexit Fuel Tanks\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)  Agusta A109 Series Helicopters\n\n \n\nAD/A109/7 Superflexit Fuel Tanks 10/86\n\nApplicability: All models A109A and A109AII fitted with Superflexit fuel tanks P/No. 109-0611- 02-7/-8 (Superflexit P/No. 18408-1-2) and P/No. 109-0611-02-9/-10 (Superflexit P/No. 18631-1/-2).\n\n \n\nRequirement: Inspect and modify in accordance with Agusta B.T. No. 109-57. Compliance: Part I of Requirement Document:\n\nAt the next Maintenance Release inspection after 31 October 1986 or before 31 January 1987 whichever occurs first.\n\n \n\nPart II of Requirement Document: Each 4 years after initial inspection.\n\nBackground: Some instances of fuel leaking have been caused by damage to the bladder due to excessive stress of the pressure hose on the retaining clamp inside the tank.\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":true,"description":"This AD imposes mandatory inspection and modification obligations on a defined subset of the A109 fleet fitted with listed Superflexit tanks, thereby altering maintenance duties for those aircraft (Applicability; Requirement; Compliance). It does not broaden airworthiness rules beyond that specified subset but creates new, recurring obligations for operators of affected installations."},"complexity_factors":["Narrow applicability to A109A/A109AII with specific Superflexit P/Ns, limiting affected population but requiring accurate equipment identification (Applicability).","Dependence on an external technical document (Agusta B.T. No. 109‑57) for the required inspection/modification steps, creating a procedural dependency (Requirement).","Fixed, near-term initial compliance window (next Maintenance Release after 31 Oct 1986 or before 31 Jan 1987) which can force scheduling or short-notice work (Compliance: Part I).","Recurring four‑year inspection interval creates ongoing maintenance burden and cost planning for operators (Compliance: Part II).","Safety‑critical nature of fuel‑system work increases need for qualified personnel, parts and quality control, raising implementation and operational costs (Background; Requirement).","Regulatory enforcement risk if operators fail to identify affected installations or to follow the Agusta technical bulletin (Applicability; Requirement)."],"plain_english_summary":"This directive requires owners/operators of Agusta A109A and A109AII helicopters fitted with the specified Superflexit fuel tanks to inspect and modify those tanks per Agusta B.T. No. 109‑57. Initial compliance is due at the next Maintenance Release after 31 Oct 1986 or before 31 Jan 1987, with repeat inspections every four years. Its stated purpose is to prevent fuel leaks from bladder damage caused by pressure‑hose/clamp stress; compliance imposes inspection/modification costs and recurring maintenance obligations on operators."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in specific helicopter models. It has not expanded beyond its original purpose of mandating fuel tank inspections and modifications."},"complexity_factors":["Single, specific technical requirement (inspect and modify per Agusta B.T. No. 109-57)","Only 2 defined part numbers for applicability","Simple two-part compliance schedule (initial + recurring)","No nested exceptions or conditional logic","Background explanation is one sentence","Total length is approximately 150 words of substantive content"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and modification of Superflexit fuel tanks on Agusta A109A and A109AII helicopters (specific part numbers) because a pressure hose can chafe the rubber bladder and cause fuel leaks. Operators must complete the initial action by the earlier of the next check after 31 Oct 1986 or 31 Jan 1987, with follow‑up inspections every four years. It’s a legally required safety fix to prevent fire hazards."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a109-7-superflexit-fuel-tanks","history":"/api/acts/ad-a109-7-superflexit-fuel-tanks/history","analysis":"/api/acts/ad-a109-7-superflexit-fuel-tanks/analysis","conflicts":"/api/acts/ad-a109-7-superflexit-fuel-tanks/conflicts","importantCases":"/api/acts/ad-a109-7-superflexit-fuel-tanks/important-cases","documents":"/api/acts/ad-a109-7-superflexit-fuel-tanks/documents"}}