{"id":"F2006B03696","name":"AD/BEECH 200/4 - Nacelle Fuel Vent Float Valve","slug":"ad-beech-200-4-nacelle-fuel-vent-float-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43286,"registerId":"commonwealth-F2006B03696-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 200/4 - Nacelle Fuel Vent Float Valve","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)  Beechcraft 200 (Super King Air) Series Aeroplanes\n\n \n\nAD/BEECH 200/4 Nacelle Fuel Vent Float Valve 12/75\n\nApplicability: Model 200 with S/Nos BB-2 to BB-71.\n\n \n\nRequirement: Action in accordance with Beechcraft SI No 0772-295. Compliance:  Within 25 hours time in service after 21 November 1975.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, one-off safety directive issued in 1975. It has not expanded beyond its original narrow purpose of addressing a specific mechanical defect in a specific aircraft series."},"complexity_factors":["Extremely short document (under 200 words)","No defined terms section","No cross-references to other legislation (only references a manufacturer service bulletin)","Single, unambiguous compliance requirement with clear deadline","Narrow applicability (specific aircraft model and serial number range)","No conditional logic, exceptions, or nested provisions"],"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 aircraft owners or operators to fix a specific mechanical problem.\n\n**What it does:** It orders owners of certain Beechcraft 200 \"Super King Air\" aeroplanes (specifically those with serial numbers BB-2 through BB-71) to inspect or replace the **nacelle fuel vent float valve**. A nacelle is the housing that holds the engine on the wing. The fuel vent float valve is a safety device that prevents fuel from spilling out of the vent system during unusual flight attitudes or turbulence.\n\n**Why it matters:** If this valve fails, fuel could leak or vent inappropriately, creating a fire risk or causing the aircraft to run out of fuel unexpectedly. This AD was issued to prevent that hazard.\n\n**Who must comply:** Anyone operating a Beechcraft 200 with the affected serial numbers.\n\n**What they must do:** Follow the instructions in **Beechcraft Service Instruction No. 0772-295** (the manufacturer's official repair guide) and complete the work within **25 hours of flying time** after 21 November 1975."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Based solely on the text provided, the directive sets a targeted requirement for Model 200 aircraft S/N BB-2 to BB-71 to carry out the action in Beechcraft SI No 0772-295 within 25 hours TIS after 21 November 1975. The document contains no language indicating an expansion or narrowing of that scope beyond the stated Applicability, Requirement, and Compliance provisions; there is no internal evidence that the scope has changed from the directive as presented."},"complexity_factors":["Narrow applicability limited to a short serial-number range (BB-2 to BB-71) — lowers complexity.","Requirement references an external document (Beechcraft SI No 0772-295) without reproducing technical detail — increases complexity because operators must obtain and interpret the SI.","Short, specific compliance window (25 hours TIS after 21 Nov 1975) — raises scheduling pressure and operational complexity.","Lack of in-text details about parts, labour, costs, or alternative compliance methods — increases administrative and implementation uncertainty.","Clear regulatory provenance (airworthiness directive format) — reduces legal-interpretive complexity about mandatory nature."],"plain_english_summary":"What this document requires (mechanics)\n\n- This is an airworthiness directive titled \"AD/BEECH 200/4 Nacelle Fuel Vent Float Valve\" (dated 12/75). It applies to Beechcraft Model 200 aeroplanes with serial numbers BB-2 through BB-71 (Applicability).\n- The directive requires that the action described in \"Beechcraft SI No 0772-295\" be carried out (Requirement).\n- The work must be completed within 25 hours time in service after 21 November 1975 (Compliance).\n\nWho it affects\n\n- The document identifies the affected fleet: Model 200, S/N BB-2 to BB-71. Practically, that means the owner/operators and maintenance organisations responsible for those specific aircraft must ensure the specified action is performed (Applicability; Requirement; Compliance).\n\nWhy it matters and how it operates in practice\n\n- By issuing this directive the regulator sets a mandatory maintenance action (the AD text directs compliance with the named Beechcraft service instruction). The AD does not include the text of that service instruction; it references Beechcraft SI No 0772-295 and makes adherence to that instruction the required compliance step (Requirement).\n\n- The AD sets a narrow, fixed compliance window: the required action must be completed within 25 hours time in service after 21 November 1975. That short window creates a scheduling obligation on operators of the listed aircraft to obtain and follow the referenced service instruction and complete the work promptly (Compliance).\n\nImplementation details the document does not provide (and practical consequences)\n\n- The AD does not include the technical steps, parts, labour estimate, or safety rationale — those are contained in the referenced Beechcraft SI No 0772-295 (Requirement). To understand the precise work, costs, and downtime, operators must obtain that service instruction.\n\n- The AD text does not specify who bears the financial cost of performing the action, nor does it describe alternative means of compliance, deferral procedures, or approval routes; any such matters would require reference to the regulator or additional regulatory relief (Requirement; Compliance).\n\nCosts, incentives and trade-offs (source-grounded)\n\n- Compliance creates a concrete task to be scheduled and performed within a short timeframe (25 hours TIS). The direct costs, downtime, and parts required are not stated in the AD itself and depend on the content of Beechcraft SI No 0772-295 (Requirement; Compliance).\n\n- The directive changes the immediate operational choices for affected aircraft: operators must prioritise obtaining the service instruction and completing the work within the specified window, which may require short-notice maintenance and associated logistics (Applicability; Requirement; Compliance).\n\nImplementation risk and compliance burden (source-grounded)\n\n- The AD relies on an external manufacturer service instruction. That dependency means the AD’s practical clarity and the burden on operators depend on the accessibility and specificity of Beechcraft SI No 0772-295 (Requirement).\n\n- The AD itself does not include provisions for alternative compliance or extensions; therefore, absent a separate regulatory action, the listed aircraft must meet the stated requirement within the stated timeframe (Requirement; Compliance).\n\nWho decides and who pays (source-grounded statements)\n\n- The directive is issued under the Commonwealth/Civil Aviation framework shown in the document header and operates as a regulator-issued airworthiness requirement (document header; Schedule of Airworthiness Directives).\n\n- The AD text does not allocate financial responsibility for the required action. The document identifies who must have the work done (owners/operators of the listed aircraft) but does not state who bears the cost.\n\nNet effect on markets and private choice (source-grounded)\n\n- The AD is narrowly targeted to specific serial-numbered aircraft. Its mechanical effect is to require a manufacturer-referenced maintenance action within a short period. Given its narrow scope, the AD is unlikely, on its face, to alter wider market competition or ownership patterns; its immediate effect is operational for the identified aircraft only (Applicability; Requirement; Compliance)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-200-4-nacelle-fuel-vent-float-valve","history":"/api/acts/ad-beech-200-4-nacelle-fuel-vent-float-valve/history","analysis":"/api/acts/ad-beech-200-4-nacelle-fuel-vent-float-valve/analysis","conflicts":"/api/acts/ad-beech-200-4-nacelle-fuel-vent-float-valve/conflicts","importantCases":"/api/acts/ad-beech-200-4-nacelle-fuel-vent-float-valve/important-cases","documents":"/api/acts/ad-beech-200-4-nacelle-fuel-vent-float-valve/documents"}}