{"id":"F2006B03617","name":"AD/BEECH 18/19 - Goodyear Fuel Cells - Inspection","slug":"ad-beech-18-19-goodyear-fuel-cells-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43208,"registerId":"commonwealth-F2006B03617-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 18/19 - Goodyear Fuel Cells - Inspection","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 6/1978,Aircraft below 5700 kg,Beechcraft 18 Series Aeroplanes,Goodyear Fuel Cells - Inspection,19\ntitle: Airworthiness Directive - AD/BEECH 18/19 - Goodyear Fuel Cells - Inspection\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 18 Series Aeroplanes\n\n \n\nAD/BEECH 18/19 Goodyear Fuel Cells - Inspection 6/78 Applicability:              Model H18 with S/Nos. BA-618 to BA-765 fitted with Goodyear BTC-39 fuel cells. Document:               Beechcraft SI No. 0895.\n\nCompliance: Within 100 hours time in service after 30 June 1978 and thereafter at intervals not exceeding twelve months.\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\nFederal Register of Legislative Instruments F2006B03617\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused on a specific known defect in a specific aircraft model. It has not expanded beyond its original purpose of mandating fuel cell inspections for the affected Beechcraft 18 series aircraft."},"complexity_factors":["Extremely short document — only 4 substantive lines of regulatory text","Only 2 defined/applicability criteria (specific model and serial number range)","Single compliance requirement with clear time trigger (100 hours TIS post-30 June 1978) and recurring interval (12 months)","No cross-references to other legislation beyond generic 'Civil Aviation Regulations 1998, Part 39'","No conditional logic, exceptions, or alternative compliance methods","Single external document reference (Beechcraft SI 0895) with no complex incorporation by reference issues"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) that requires specific aircraft owners and operators to inspect or fix a known safety problem.\n\n**What it does:** It orders owners of specific **Beechcraft 18 Series aeroplanes** (specifically Model H18 with serial numbers BA-618 to BA-765) to inspect their **Goodyear BTC-39 fuel cells** (the rubber bladders inside the fuel tanks that hold aviation fuel).\n\n**Who must comply:** Anyone operating a Beechcraft H18 with those specific serial numbers that has Goodyear BTC-39 fuel cells installed.\n\n**What they must do:**\n- **First inspection:** Must be done within 100 hours of flying time after 30 June 1978\n- **Repeat inspections:** Must be done at least once every 12 months after that\n\n**Why it matters:** Fuel cells can degrade, leak, or fail over time. A leaking fuel cell in an aircraft creates serious fire and explosion risks. This AD ensures potential defects are caught before they cause accidents.\n\n**Technical reference:** The inspection must follow the procedures in **Beechcraft Service Instruction No. 0895** (the manufacturer's official maintenance guidance)."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The text provides a single, focused directive limited to Model H18 serial numbers BA-618 to BA-765 fitted with Goodyear BTC-39 fuel cells, and sets a clear inspection schedule. There is no indication in the instrument itself that the scope has been altered from its original stated applicability or that additional aircraft, components, or actions were added or removed."},"complexity_factors":["Narrow applicability (single aircraft model and a limited range of serial numbers: Applicability).","Single recurring action required (inspection) with a simple timing schedule (initial within 100 hours after 30 June 1978, then at intervals not exceeding 12 months: Compliance).","Dependence on an external maintenance document (Beechcraft Service Instruction No. 0895) to define inspection procedures (Document), which requires access to and interpretation of that service instruction.","Regulatory enforcement context is standard (issued under Part 39 by CASA) but the AD contains no multiple conditional paths, exemptions, or technical parameter thresholds in the text provided."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specified Beechcraft Model H18 (serial BA-618–BA-765) fitted with Goodyear BTC-39 fuel cells to inspect those fuel cells within 100 flight hours after 30 June 1978 and thereafter at least annually, using Beechcraft Service Instruction No. 0895. It imposes recurring compliance costs, scheduling burdens and reliance on the manufacturer’s procedure to maintain airworthiness."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-18-19-goodyear-fuel-cells-inspection","history":"/api/acts/ad-beech-18-19-goodyear-fuel-cells-inspection/history","analysis":"/api/acts/ad-beech-18-19-goodyear-fuel-cells-inspection/analysis","conflicts":"/api/acts/ad-beech-18-19-goodyear-fuel-cells-inspection/conflicts","importantCases":"/api/acts/ad-beech-18-19-goodyear-fuel-cells-inspection/important-cases","documents":"/api/acts/ad-beech-18-19-goodyear-fuel-cells-inspection/documents"}}