{"id":"F2006B05196","name":"AD/CESSNA 205/12 - Goodyear Fuel Cells","slug":"ad-cessna-205-12-goodyear-fuel-cells","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45385,"registerId":"commonwealth-F2006B05196-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 205/12 - Goodyear Fuel Cells","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)  Cessna 205 (210-5) Series Aeroplanes\n\n \n\nAD/CESSNA 205/12 Goodyear Fuel Cells 6/78\n\nApplicability: All models 205 fitted with Goodyear BTC-39 fuel cells. Requirement:  Action in accordance with Cessna SL No. SE78-10.\n\nCompliance: Within 100 hours time in service after 30 June 1978 and annually thereafter as detailed in Cessna SL No. SE78-10.\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":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive targeting a specific aircraft model and fuel cell type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (under 150 words)","Only one defined applicability criterion (Goodyear BTC-39 fuel cells)","Single cross-reference to external document (Cessna SL No. SE78-10)","Simple binary compliance structure (initial + recurring)","No nested exceptions, conditional logic, or interpretive provisions","Standardised AD format with minimal variation"],"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 Cessna aircraft.\n\n**What it does:**\n- Requires owners and operators of **Cessna 205 (also known as 210-5) series aeroplanes** to take specific safety action if their aircraft are fitted with **Goodyear BTC-39 fuel cells**.\n- The required action is detailed in **Cessna Service Letter No. SE78-10** — a technical bulletin from the manufacturer describing inspections or repairs needed for these fuel cells.\n\n**Who it affects:**\n- Owners and operators of Cessna 205/210-5 model aircraft with the specified Goodyear fuel cells.\n- Maintenance engineers and organisations servicing these aircraft.\n\n**When compliance is required:**\n- **First inspection:** Within 100 hours of flying time after 30 June 1978.\n- **Ongoing:** Annually thereafter, following the procedures in the referenced Cessna service letter.\n\n**Why it matters:**\nFuel cells (flexible fuel tanks) can degrade over time, potentially leading to fuel leaks or fire hazards. This directive ensures ongoing inspection of a specific fuel cell model to prevent catastrophic failures. Non-compliance grounds the aircraft — it cannot legally fly until the work is done."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD text defines applicability as all Cessna 205 models fitted with Goodyear BTC-39 fuel cells and mandates compliance with Cessna Service Letter No. SE78-10 within the stated timeframes. The document provides no indication that the scope has been expanded or narrowed from an earlier intent within the text supplied; it sets a single, fixed applicability and recurring compliance schedule."},"complexity_factors":["Reference to an external technical document (Cessna SL No. SE78-10) rather than containing technical steps in the AD itself","Recurring compliance requirement (initial within 100 hours after 30 June 1978, then annually) creates ongoing obligations","Limited but specific applicability (only Cessna 205 models fitted with Goodyear BTC-39 fuel cells) requires owners/operators to determine applicability for each airframe","Absence of procedural detail in the AD (e.g. record-keeping, qualifications for personnel, alternative compliance methods) shifts interpretive work to operators, maintainers and the Service Letter","Temporal specificity tied to a historical date (30 June 1978) which requires operators to calculate time-in-service windows"],"plain_english_summary":"This Airworthiness Directive applies to Cessna 205 (210-5) aeroplanes fitted with Goodyear BTC-39 fuel cells and makes compliance with Cessna Service Letter SE78-10 mandatory. The required work must be done within 100 hours’ time-in-service after 30 June 1978 and repeated annually. Aircraft owners, operators and maintenance organisations are legally obliged to follow the Service Letter’s procedures."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-205-12-goodyear-fuel-cells","history":"/api/acts/ad-cessna-205-12-goodyear-fuel-cells/history","analysis":"/api/acts/ad-cessna-205-12-goodyear-fuel-cells/analysis","conflicts":"/api/acts/ad-cessna-205-12-goodyear-fuel-cells/conflicts","importantCases":"/api/acts/ad-cessna-205-12-goodyear-fuel-cells/important-cases","documents":"/api/acts/ad-cessna-205-12-goodyear-fuel-cells/documents"}}